CN102033640A - Touch system and multi-point positioning method - Google Patents
Touch system and multi-point positioning method Download PDFInfo
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- CN102033640A CN102033640A CN2009102352447A CN200910235244A CN102033640A CN 102033640 A CN102033640 A CN 102033640A CN 2009102352447 A CN2009102352447 A CN 2009102352447A CN 200910235244 A CN200910235244 A CN 200910235244A CN 102033640 A CN102033640 A CN 102033640A
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Abstract
The invention discloses a touch system and a multi-point positioning method. The touch system comprises a main touch positioning system, a pair of infrared geminate transistor arrays and a processing unit, wherein the main touch positioning system is used for positioning a touch object to obtain the preliminary introduction position information of the touch object; the infrared geminate transistor arrays are used for acquiring the one-dimension position information of the touch object; and the processing unit is connected with the main touch positioning system and the infrared geminate transistor arrays, and is used for confirming the position information of the touch object according to the preliminary position information of the touch object and the one-dimension position information and sending the position information to a main controller. By using the touch system and multi-point positioning method provided by the invention, a ghost point can be eliminated effectively, and the multi-point positioning is realized.
Description
Technical field
The present invention relates to photoelectric detection technology field, relate in particular to a kind of touch system and multipoint positioning method.
Background technology
Touch-screen is as a kind of up-to-date computer input equipment, no longer has been dispensable thing for the computer of various applications, but imperative equipment.It has simplified the use of computing machine greatly, even the people that computing machine is known nothing also can write with facility in the same old way, makes computer exhibition reveal bigger glamour.It has solved the insurmountable problem of computing machine on the public information market.
For a long time, touch-screen market is in the situation that the five colours appear, and adopts the touch-screen of different technologies to be applicable to different applied environments.But present most of touch-screen can only solve the single-point location by touch-screen, and will realize that multipoint positioning has certain degree of difficulty.
Summary of the invention
The object of the present invention is to provide a kind of touch system and the multipoint positioning method that can realize multipoint positioning, to overcome weak point of the prior art.
By a kind of touch system of this purpose design, this touch system includes
Main touching and positioning system is used for touch objects is positioned to obtain the preliminary positional information of touch objects;
A pair of infrared tube array is used to obtain the one dimension positional information of touch objects;
Processing unit links to each other with described infrared tube array with described main touching and positioning system, is used for determining the positional information of touch objects and being sent to primary controller according to the preliminary positional information and the one dimension positional information of touch objects.
The present invention also provides a kind of method of multipoint positioning, and this method includes
Touch objects is positioned to obtain the preliminary positional information of touch objects;
Obtain the one dimension positional information of touch objects;
Determine the positional information of touch objects according to the preliminary positional information of touch objects and one dimension positional information.
In technique scheme, the present invention by obtaining touch objects earlier preliminary positional information and the one dimension positional information of touch objects, and then get rid of " terrible point " to determine position of touch objects according to the one dimension positional information of the preliminary positional information of obtaining touch objects and touch objects, can effectively get rid of " terrible point " like this, realize multipoint positioning.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one described a kind of touch system;
Fig. 2 is the structural representation of the embodiment of the invention two described a kind of touch systems;
Fig. 3 is a kind of multipoint positioning method process flow diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with specification drawings and specific embodiments.
" main touching and positioning system " described in the embodiment of the invention is meant the touch system that can position touch objects, it is used for touch objects is positioned to obtain the preliminary positional information of touch objects, from plate, resistive touch screen, surface capacitance type touch screen, projected capacitive touch screen, optical touch screen, surface acoustic wave touch screen, flexural wave formula touch-screen etc., but this main touching and positioning system does not comprise the infrared type touch-screen as electronics.
Fig. 1 is the structural representation of the embodiment of the invention one described a kind of touch system, and this touch system includes main touching and positioning system, infrared tube array and processing unit 107.Main touching and positioning system among this embodiment is an optical touch screen, and promptly the main touching and positioning system in the present embodiment is to utilize imageing sensor to use triangulation to realize the touch-screen that touch objects is positioned.This optical touch screen includes touch panel 101, light source 103, retroreflecting bar 102, infrared camera 104 and processor, and wherein processor is arranged in processing unit 107, is used to utilize triangulation to calculate the preliminary positional information of touch objects; Touch panel 101 has the four edges edge, i.e. first edge 110, second edge 111, the 3rd edge 108 and the 4th edge 109; Imageing sensor in this enforcement is an infrared camera 104, number is two, be installed on two adjacent angles of touch panel 101, promptly an infrared camera 104 is installed in respectively on the angle of being made up of first edge 110 and the 4th edge 109, and another infrared camera 104 is installed in respectively on the angle of being made up of first edge 110 and second edge 111; Light source 103 be installed in infrared camera 104 near, light source in this enforcement 103 adopts infrared light supplies; Retroreflecting bar 102 is installed on three edges of touch panel 101, near its light reflected back light source 103 that is used for light source 103 is sent, so that for infrared camera 104 provides the image information of catching touch objects required illumination, promptly retroreflecting bar 102 is installed on second edge 111, the 3rd edge 108 and the 4th edge 109 of touch panel 101.The infrared tube array is made up of one a group of power valve group 105 and a group of received pipe group 106, and it is used to obtain the one dimension positional information of touch objects; Power valve group 105 is installed in the 3rd edge 108 of touch panel 101, and receiving tube group 106 is installed in first edge 110 of touch panel 101, and power valve group 105 is relative with receiving tube group 106.On the 3rd edge 108 of touch panel 101, retroreflecting bar 102 is positioned at above the power valve group 105.Processing unit 107 links to each other with the infrared tube array with infrared camera 104 respectively, and promptly processing unit 107 links to each other with 2 infrared cameras 104, also links to each other with receiving tube group 106 with power valve group 105; Processing unit 107 is used for determining the positional information of touch objects and being sent to primary controller according to the preliminary positional information of touch objects and one dimension positional information.Processing unit 107 is separated from each other with touch panel in Fig. 1, in actual applications generally with processing unit 107 and being made of one of touch panel.
In Fig. 1, also can in described processing unit, add a control module again, it is simultaneously luminous that this control module can be controlled in the infrared transmitting tube group in the described infrared tube array all infrared transmitting tubes, so that provide illumination for the imageing sensor among Fig. 1.In addition in Fig. 1, we also available light source replace the retroreflecting bar.
Fig. 2 is the structural representation of the embodiment of the invention two described a kind of touch systems, and this touch system comprises main touching and positioning system, infrared tube array and processing unit 107.The main touching and positioning system of this touch system is a surface acoustic wave touch screen, surface acoustic wave touch screen includes touch panel 101, two ultrasound transmitting transducer 201a, 203a, two ultrasound wave receiving transducer 201b, 203b, four reflective array 202a, 202b, 204a, 204b and processors, wherein processor is arranged in processing unit 107, is used for determining according to the received information of acoustic wave of receiving transducer 201b, 203b the preliminary positional information of touch objects; Two ultrasound transmitting transducer 201a, 203a, two ultrasound wave receiving transducer 201b, 203b are installed on three angles of touch panel 101, promptly on touch panel 101, do not have the transducer on the angle of first edge 110 and second edge, 111 compositions, its excess-three all has transducer on the angle; Four reflective array 202a, 202b, 204a, 204b are installed in respectively on the four edges edge of touch panel 101.Reflective array 202a, 202b, 204a, 204b and touch panel 101 during this implements can both conduct acoustic waves.Utilizing this surface acoustic wave touch screen in implementing to come object is positioned is common practise, has not here just repeated.The infrared tube array is made up of one a group of power valve group 105 and a group of received pipe group 106, and it is used to obtain the one dimension positional information of touch objects; Power valve group 105 is installed in the 3rd edge 108 of touch panel 101, and receiving tube group 106 is installed in first edge 110 of touch panel 101, and power valve group 105 is relative with receiving tube group 106.On first edge 110 of touch panel 101, receiving tube group 106 is positioned at above the reflective array 202a; On the 3rd edge 108 of touch panel 101, power valve group 105 is positioned at above the reflective array 202b.Processing unit 107 links to each other with the infrared tube array with two ultrasound wave receiving transducer 201b, 203b respectively, and promptly processing unit 107 and two ultrasound wave receiving transducer 201b, 203b also link to each other with receiving tube group 106 with power valve group 105; Processing unit 107 is used for determining the positional information of touch objects and being sent to primary controller according to the preliminary positional information of touch objects and one dimension positional information.。Processing unit 107 is separated from each other with touch panel in Fig. 2, in actual applications generally with processing unit 107 and being made of one of touch panel.
Fig. 3 is a kind of multipoint positioning method process flow diagram of the present invention, and this method may further comprise the steps:
Step 300: obtain preliminary positional information.
This step is specially: touch objects is positioned to obtain the preliminary positional information of touch objects.The general main touching and positioning system of preliminary positional information that touch objects is positioned the touch objects of obtaining is finished, and described main touching and positioning system can be a kind of in electronic whiteboard, resistive touch screen, surface capacitance type touch screen, projected capacitive touch screen, optical touch screen, surface acoustic wave touch screen, the flexural wave formula touch-screen.And utilize a kind of touch system in electronic whiteboard, resistive touch screen, surface capacitance type touch screen, projected capacitive touch screen, optical touch screen, surface acoustic wave touch screen, the flexural wave formula touch-screen to position common practise, here just do not repeated.The preliminary positional information of touch objects described here can be the coordinate of touch objects, also can represent the preliminary position of touch objects with out of Memory.As at main touching and positioning system described in Fig. 1 just for utilizing imageing sensor to use triangulation to realize the optical touch screen that touch objects is positioned.The preliminary positional information of touch objects is represented with the coordinate of touch objects.In the touch system described in Fig. 1, owing to there are two touch objects to touch touch panel simultaneously, thereby touch system can determine that the preliminary position of touch objects has four after this step, as the A among the figure, B, C, D, wherein the coordinate of A be (X1, Y1), the coordinate of B be (X2, Y2), the coordinate of C is (X3, Y3), the coordinate of D be (X4, Y4).As at main touching and positioning system described in Fig. 2 just for to utilize sound wave to realize the surface acoustic wave touch screen that touch objects is positioned.The preliminary positional information of the touch objects also coordinate of available touch objects is represented.In the touch system described in Fig. 2, owing to also have two touch objects to touch touch panel simultaneously, thereby touch system can determine that the preliminary position of touch objects has four after this step, as the E among the figure, F, G, H, wherein the coordinate of E be (X5, Y5), the coordinate of F be (X6, Y6), the coordinate of G is (X7, Y7), the coordinate of H be (X8, Y8).Promptly after this step, in described main touching and positioning system shown in Figure 1 the preliminary positional information of resulting touch objects be A (X1, Y1), B (X2, Y2), C (X3, Y3), D (X4, Y4), the preliminary positional information of resulting touch objects is E (X5 in described main touching and positioning system shown in Figure 2, Y5), F (X6, Y6), G (X7, Y7), H (X8, Y8), wherein X represents horizontal ordinate, and Y represents ordinate.
Step 301: obtain the one dimension positional information.
This step is specially: the one dimension positional information of obtaining touch objects.Here we obtain the one dimension positional information of touch objects by a pair of infrared tube array.The one dimension positional information of touch objects described here can be the coordinate of touch objects, also can represent the one dimension positional information of touch objects with out of Memory, but need with step 300 in the preliminary positional information of touch objects be consistent.The one dimension positional information of touch objects described here is meant the positional information of touch objects on the same direction.When representing the one dimension positional information of touch objects with coordinate, the one dimension positional information of described touch objects is meant the horizontal ordinate or the ordinate of touch objects, the preliminary position of described touch objects and the positional information of touch objects are to represent with the horizontal ordinate and the ordinate of touch objects, the above coordinate representation of the also available two dimension of preliminary positional information of touch objects certainly.Because the preliminary positional information of touch objects is all used coordinate representation in Fig. 1 and Fig. 2, thereby the one dimension positional information of touch objects is also used coordinate representation in this step.In touch system shown in Figure 1, the one dimension positional information that obtains touch objects through this step is Y1 and Y2; In touch system shown in Figure 2, the one dimension positional information that obtains touch objects through this step is K11 and K21, wherein the scan mode of infrared tube array is different among the scan mode of the infrared tube array among Fig. 2 and Fig. 1, the scan mode of the infrared tube array among Fig. 2 is oblique scanning, K11 is the position at dotted line 205 places, and K21 is the position at dotted line 206 places.In actual applications, the scan mode of the infrared tube array among Fig. 1 also can adopt oblique scanning.
Step 302: determine positional information.
This step is specially: the positional information of determining touch objects according to the preliminary positional information of touch objects and one dimension positional information.The positional information of touch objects described here can be the coordinate of touch objects, also can represent the preliminary position of touch objects with out of Memory, but need with step 300 in the preliminary positional information of touch objects be consistent.In Fig. 1 and Fig. 2, after step 300 and step 301, preliminary positional information of touch objects and one dimension positional information have all been obtained.When carrying out this step, just can determine the positional information of touch objects according to the preliminary positional information of touch objects and one dimension positional information.In Fig. 1, according to the preliminary positional information of touch objects be A (X1, Y1), B (X2, Y2), C (X3, Y3), D (X4, Y4) and the one dimension positional information of touch objects be Y1 and Y2, we just can determine that A, B are true touch point at 2, C and D are pseudo-touch point or empty touch point, also C and D can be called " terrible point ", the position that obtains touch objects like this be A (X1, Y1), B (X2, Y2).In Fig. 2, according to the preliminary positional information of touch objects be E (X5, Y5), F (X6, Y6), G (X7, Y7), H (X8, Y8) and the one dimension positional information of touch objects be K11, K21 we also can determine to touch the positional information of thing.In Fig. 2, we find that (X5 Y5) is positioned on the dotted line 206 E, 206 one dimension positional information is K21 by a dotted line, just can determine that the E point is a true touch point, in like manner F (X6, Y6) be positioned on the dotted line 205,205 one dimension positional information is K11 by a dotted line, just can determine that the F point is a true touch point.Two other G and H are pseudo-touch point or empty touch point like this, the position of touch objects be E (X5, Y5), F (X6, Y6).
In said method, step 300 and step 301 also can be turned around, and execution in step 300 again after the promptly first execution in step 301 so also can obtain the positional information of touch objects; If system configuration is good, step 300 and step 301 also can be carried out simultaneously.
By the description of said method, we can find out that touch system of the present invention and multipoint positioning method can be realized multipoint positioning, get rid of pseudo-touch point or empty touch point or " terrible point ".
Main touching and positioning system of the present invention also can be the touch sensing system of other types such as electric resistance touch screen, capacitance touch screen, projection-type capacitive touch screen, flexural wave touch-screen, when technical solutions according to the invention are applied on electric resistance touch screen, capacitance touch screen, projection-type capacitive touch screen, the flexural wave touch-screen, be that touch system described in the localization method of main touching and positioning system and the embodiment of the present invention is different, but the method for multipoint positioning and above-mentioned method are similar, have not just described in detail at this.
Method of the present invention is not limited to the embodiment described in the embodiment.Those skilled in the art's technical scheme according to the present invention draws other embodiment, belongs to technological innovation scope of the present invention equally.
Claims (17)
1. a touch system is characterized in that, this touch system includes
Main touching and positioning system is used for touch objects is positioned to obtain the preliminary positional information of touch objects;
A pair of infrared tube array is used to obtain the one dimension positional information of touch objects;
Processing unit links to each other with described infrared tube array with described main touching and positioning system, is used for determining the positional information of touch objects and being sent to primary controller according to the preliminary positional information and the one dimension positional information of touch objects.
2. a kind of touch system according to claim 1 is characterized in that: the one dimension positional information of described touch objects is meant the positional information of touch objects on the same direction.
3. a kind of touch system according to claim 1, it is characterized in that: the one dimension positional information of described touch objects is meant the horizontal ordinate or the ordinate of touch objects, and the preliminary positional information of described touch objects and the positional information of touch objects are to represent with the horizontal ordinate and the ordinate of touch objects.
4. a kind of touch system according to claim 1, it is characterized in that: described infrared tube array is made up of relative one group of infrared transmitting tube group and one group of infrared receiving tube group, and described infrared transmitting tube group is positioned at respectively on two relative limits that touch surveyed area with the infrared receiving tube group.
5. according to the described a kind of touch system of one of claim 1 to 4, it is characterized in that described main touching and positioning system is a kind of in resistive touch screen, surface capacitance type touch screen, projected capacitive touch screen, optical touch screen, surface acoustic wave touch screen, the flexural wave formula touch-screen.
6. according to the described a kind of touch system of one of claim 1 to 4, it is characterized in that: described main touching and positioning system is an optical touch screen, and this optical touch screen includes:
At least two imageing sensors are used to obtain the image information of touch objects;
Light source is used to described imageing sensor to obtain the touch objects image information illumination is provided.
7. a kind of touch system according to claim 6, it is characterized in that: described optical touch screen includes the frame of a rectangle, it comprises first edge, second edge, the 3rd edge and the 4th edge, and first edge is relative with the 3rd edge, described two imageing sensors are separately fixed on the angle at first edge of described frame and second edge and on the angle at first edge and the 4th edge, light source is two groups, every group of light source is positioned near each imageing sensor, is positioned at infrared transmitting tube group and infrared receiving tube group on described first edge and the 3rd edge or on described second edge and the 4th edge in the described infrared tube array.
8. a kind of touch system according to claim 7 is characterized in that: described touch system also includes the retroreflecting bar, is installed in respectively on second edge, the 3rd edge and the 4th edge of described frame.
9. a kind of touch system according to claim 8 is characterized in that: be positioned at infrared transmitting tube group and infrared receiving tube group on described first edge and the 3rd edge in the described infrared tube array.
10. a kind of touch system according to claim 9, it is characterized in that: the infrared transmitting tube group in the described infrared tube array is positioned on the 3rd edge, include control module in the described processing unit, it is simultaneously luminous that this control module can be controlled in the infrared transmitting tube group in the described infrared tube array all infrared transmitting tubes.
11. a kind of touch system according to claim 7 is characterized in that: described light source is positioned on one or more the edge that is installed in described frame respectively.
12. a kind of touch system according to claim 11, it is characterized in that: include control module in the described processing unit, it is simultaneously luminous that this control module can be controlled in the infrared transmitting tube group in the described infrared tube array all infrared transmitting tubes, and the infrared transmitting tube group in the described infrared tube array and light source are not positioned on the same edge of described frame.
13. a multipoint positioning method is characterized in that, this method comprises:
Touch objects is positioned to obtain the preliminary positional information of touch objects;
Obtain the one dimension positional information of touch objects;
Determine the positional information of touch objects according to the preliminary positional information of touch objects and one dimension positional information.
14. a kind of multipoint positioning method according to claim 13 is characterized in that: the one dimension positional information of described touch objects is meant the positional information of touch objects on the same direction.
15. a kind of multipoint positioning method according to claim 13, it is characterized in that: the one dimension positional information of described touch objects is meant the horizontal ordinate or the ordinate of touch objects, and the preliminary position of described touch objects and the positional information of touch objects are to represent with the horizontal ordinate and the ordinate of touch objects.
16. according to the described a kind of multipoint positioning method of one of claim 13 to 15, it is characterized in that: the one dimension positional information of obtaining touch objects by an infrared tube array.
17. a kind of multipoint positioning method according to claim 16, it is characterized in that, described main touching and positioning system is an optical touch screen, described main touching and positioning system positions the preliminary positional information that obtains touch objects to touch objects and is specially: obtain the image information of touch objects by imageing sensor, calculate the preliminary positional information of touch objects again according to the image information of obtaining touch objects.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910235244 CN102033640B (en) | 2009-09-30 | 2009-09-30 | Touch system and multi-point positioning method |
| JP2012531225A JP2013506213A (en) | 2009-09-30 | 2010-09-29 | Touch screen, touch system, and touch object position determination method in touch system |
| KR1020127010767A KR101697133B1 (en) | 2009-09-30 | 2010-09-29 | Touch screen, touch system and method for positioning a touch object in a touch system |
| PCT/CN2010/077464 WO2011038682A1 (en) | 2009-09-30 | 2010-09-29 | Touch screen, touch system and method for positioning touch object in touch system |
| US13/497,337 US8928608B2 (en) | 2009-09-30 | 2010-09-29 | Touch screen, touch system and method for positioning a touch object in touch system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910235244 CN102033640B (en) | 2009-09-30 | 2009-09-30 | Touch system and multi-point positioning method |
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| CN102033640A true CN102033640A (en) | 2011-04-27 |
| CN102033640B CN102033640B (en) | 2013-12-25 |
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| CN 200910235244 Expired - Fee Related CN102033640B (en) | 2009-09-30 | 2009-09-30 | Touch system and multi-point positioning method |
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| CN103092430A (en) * | 2011-11-03 | 2013-05-08 | 原相科技股份有限公司 | Optical touch system and positioning method thereof |
| CN103164085A (en) * | 2011-12-16 | 2013-06-19 | 冠捷投资有限公司 | Touch device |
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| CN108108074A (en) * | 2018-01-26 | 2018-06-01 | 江西合力泰科技有限公司 | A kind of large scale self-capacitance touch-control film and its application |
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| 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 |
| CN103092430A (en) * | 2011-11-03 | 2013-05-08 | 原相科技股份有限公司 | Optical touch system and positioning method thereof |
| CN103092430B (en) * | 2011-11-03 | 2016-01-13 | 原相科技股份有限公司 | Optical touch control system and localization method thereof |
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| CN109885213A (en) * | 2019-03-11 | 2019-06-14 | 广州视源电子科技股份有限公司 | Touch signal processing method and intelligent interactive panel |
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| CN102033640B (en) | 2013-12-25 |
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