CN101226446B - Infrared touch panel and multi-point touch locating method - Google Patents
Infrared touch panel and multi-point touch locating method Download PDFInfo
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- CN101226446B CN101226446B CN2008100257053A CN200810025705A CN101226446B CN 101226446 B CN101226446 B CN 101226446B CN 2008100257053 A CN2008100257053 A CN 2008100257053A CN 200810025705 A CN200810025705 A CN 200810025705A CN 101226446 B CN101226446 B CN 101226446B
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Abstract
The invention relates to an infrared touch screen, wherein on at least on detection direction, an infrared emitter and two infrared receivers are deflected toward the center of a touch screen to inverse the directions of the infrared emitter and the infrared receivers to form crossed relation. The invention further provides a multipoint touch positioning method of the infrared touch screen, whichcomprises (a), respectively initializing the infrared receiver vertical with the infrared emitter and the infrared receiver inclined and opposite with the infrared emitter, (b), vertically scanning and detecting, comparing with vertical initialized value, (c), calculating the possible position coordinate of each touch point, (d), processing inclined scanning detection to be compared with inclinedinitialized value, (e), determining the relation expression between the real coordinates X, Y of the touch point, checking the possible coordinates calculated in the step (c) in the relation expression, and determining the position coordinate of each touch point. The invention has simple structure and low cost, which can realize accuracy multipoint touch positioning.
Description
[technical field]
The present invention relates to a kind of infrared touch panel, particularly a kind ofly can distinguish infrared touch panel and the multi-point touch locating method of operating simultaneously a plurality of touch points.
[background technology]
At present, touch-screen has obtained being extensive use of in many occasions and field as the input equipment of a kind of replacement or additional common keyboard and mouse.In existing touch-screen, the detection and localization technology in senses touch place can be based on different technology, comprise infrared, camera, surface acoustic wave etc.The user does not need only need press touch-screen on the ground that relevant icon marks through special operation training usually, just can implement the instruction of a succession of complexity.
Development along with development of science and technology especially computer hardware technique, computing machine has strong functions, almost can be applied to any field that we can imagine, and the multiple point touching technology more can make things convenient for user's operational computations machine, this just requires touch-screen to support the multiple point touching operation, can detect the more than one touch point of identification.The technical scheme of present several realization multiple point touchings is 02822048.X as application number, the scheme that 200580011740.4 Chinese patent is announced, and be not suitable for infrared touch panel.
Can't discern the problem of a plurality of touch points for solving infrared touch panel, industry has been made many good tries, as strengthening the judgement of infrared touch panel to a plurality of touch points by designing complicated auxiliary judgment circuit, distinguish a plurality of touch points or the like at additionally additional one or two camera of the outward flange of infrared touch panel, so all, all need to change the structure of existing infrared touch panel and the composition of system, on the basis of existing infrared touch panel, increase more cost.Also have at present not change the sequencing that hardware takes place by the senses touch incident and discern the method for a plurality of touch points, but do not relatively move for having between a plurality of touch points, do not have yet the shape sizes values of touch point can the situation of reference under, judge by accident easily.
In addition, existing infrared touch panel is for the ease of data processing and transmission, its master microprocessor generally is arranged on the circuit board for receiving, can cause certain difficulty for the outlet touch screen structure design that has certain requirements like this, and it is dumb to make touch screen structure arrange.
Infrared touch panel shown in Figure 1, its infrared components is to same direction deflection, infrared emission component 101,102,103,104 to the certain angle of same direction deflection, corresponding infrared receiver component 105,106,107,108 also towards the identical angle of same direction deflection, 101 except vertical with 105 over against, also with 107 tilt corresponding; 102 except vertical with 106 over against, also with 108 tilt corresponding.Adopt the sort circuit structure, can realize that vertical scanning detects and dip sweeping detects definite each touch point position coordinate.Adopt illustrated arrangement method, can on the large-size touch-screen, realize multiple point touching identification, but because infrared components is partial to same direction, shown in Fig. 1 111 can appear, 112,113,114 four zones that do not have dip sweeping to detect, these several zones become the blind area that dip sweeping detects.In these several whens zone, touch point identification is difficulty as a plurality of touch points.These problems can have influence on actual result of use when occurring on undersized touch-screen.
In view of present infrared touch panel system above shortcomings, a kind of existing infrared touch panel composition structure that do not change is provided, simultaneously need not increase extra cost, can realize multiple point touching location and reduce erroneous judgement, and reducing scanning, to detect the infrared touch panel structure of blind area and multi-point touch locating method real be necessity.
[summary of the invention]
The object of the present invention is to provide a kind of infrared touch panel system, it does not need to design complicated circuit structure, do not need to be strict with the optical axis of infrared components over against just discerning two or more touch operation yet, cost is relatively low, can realize multiple point touching location more accurately.
Another object of the present invention provides a kind of multiple spot of can realizing and touches the multi-point touch locating method that also can report effective touch location simultaneously.
For realizing the object of the invention, provide following technical scheme:
A kind of infrared touch panel, at least one detection side upwards, infrared emission component and infrared receiver component are all towards the direction deflection of touch screen center, make infrared receiver component on infrared emission component and the infrared reception sweep circuit on the infrared emission sweep circuit towards relative, form and intersect corresponding relation.Specifically, the vertical corresponding infrared receiver component A ' of infrared emission component A, corresponding receiving element B ' simultaneously tilts; And with the vertical corresponding infrared emission component B of receiving element B ' except corresponding B ', also corresponding simultaneously receiving element A ', radiated element A, B like this, receiving element A ', B ' formation intersect corresponding relation.
Infrared components recited above is vertical corresponding and tilt correspondingly, just represents infrared components at the locational corresponding relation of actual installation, is not that the position that infrared components is accurately adjusted in requirement makes their optical axis keep above-mentioned corresponding relation.This deflection angle size can be calculated definite in conjunction with the size that touches surveyed area according to the parameter of selected infrared emission component and infrared receiver component; Also can test by experiment, determine according to actual effect.Under the prerequisite that satisfies the infrared receiver component received energy, the deflection angle of infrared components should be big as far as possible, like this, can distinguish each touch point position better, improves a plurality of touch points Coordinate Calculation precision.
Adopt the infrared touch panel of above-mentioned corresponding relation, its master microprocessor can be arranged on the circuit board for receiving, also can be placed on the radiating circuit plate, correspondingly, has 1 to 2 microprocessor on the radiating circuit plate of certain direction, all be arranged on the circuit board for receiving comparatively speaking with the master microprocessor of prior art, laying of master microprocessor is more flexible, satisfies the needs of different structure form touch-screen.Master microprocessor is arranged in after the radiating circuit plate, and dash receiver can have only a microprocessor.
Adopt technical scheme of the present invention, the scanning testing process can be divided into two stages, in half scan period, finishes the vertical scanning testing process that common infrared touch panel uses; In other half scan period, when certain infrared emission component is lighted once more, its light that sends is received by another infrared receiver component that tilts relative with it and detects, and infrared emission component is connected one by one and lighted, and the infrared receiver component relative with their inclinations receives detection one by one.Detect for being different from vertical scanning, this process is called dip sweeping here and detects.
The scanning sequence of infrared emission circuit board and infrared dash receiver can have multiple, and for example the infrared emission circuit board adopts different sequential, and the infrared receiving circuit plate adopts and the identical sequential of corresponding infrared emission circuit board; Also can be that the infrared receiving circuit plate adopts different sequential, the infrared emission circuit board adopts sequential identical with corresponding infrared receiving circuit plate or the like.
The infrared receiving circuit plate adopts with the course of work of the identical sequential of corresponding infrared emission circuit board and gives an example: supposing has N infrared emission component or infrared receiver component on the every circuit board, suppose that with the 1st radiated element relative receiving element that tilts be M receiving element, with the 2nd radiated element relative receiving element that tilts is M+1 receiving element, arrange according to this, the receiving element relative with N-M+1 radiated element inclination is N receiving element.When carrying out vertical scanning, radiated element and receiving element are all connected one by one since the 1st, up to N; When carrying out dip sweeping, radiated element is still since the 1st, radiated element is connected one by one from the 1st to N-M+1 and is lighted, the receiving element relative with their inclinations also connected one by one from M to N and detected, continue scanning, N-m+2 connects when lighting one by one to N radiated element, the connection of receiving element turns back to the front in proper order, connect detection one by one from the 1st to M-1, at this moment, the 1st to M-1 receiving element received be from the other radiating circuit plate with they the relative light that infrared emission component sent that tilts.Equally, N-M+2 light that sends to N infrared emission component is received by the infrared receiver component relative with their inclinations on the other circuit board for receiving.
The infrared receiving circuit plate adopts with the course of work of the different sequential of corresponding infrared emission circuit board and gives an example: supposing has N infrared emission component or infrared receiver component on the every circuit board, with mentioned above identical, suppose with M receiving element tilt relative radiated element be vertical on the radiating circuit plate of radiated element place the 1st radiated element, with M+1 receiving element tilt relative radiated element be vertical on the radiating circuit plate of radiated element place the 2nd radiated element, be arranged in order, with N receiving element relative radiated element that tilts is N-M+1 radiated element, equally, with the 1st receiving element relative radiated element that tilts is N-M+2 radiated element on another piece radiating circuit plate, with M-1 receiving element relative radiated element that tilts is N radiated element on another piece radiating circuit plate, when carrying out the vertical scanning detection, radiated element and receiving element are all connected one by one since the 1st, up to N; When carrying out the dip sweeping detection, receiving element is still since the 1st, receiving element is connected one by one from the 1st to M-1 and is detected, the individual connection one by one to N infrared emission component of N-M+2 lighted, at this moment, reception is individual to N the light that infrared emission component sent from the N-M+2 relative with their inclinations on the other radiating circuit plate.Continue scanning, connect one by one when detecting to N receiving element for M, the connection of radiated element turns back to the front in proper order, and connection is lighted one by one from the 1st to N-M+1.
Adopt technical scheme of the present invention, infrared emission component forms the corresponding relation of intersecting with infrared receiver component, corresponded manner with respect to Fig. 1, can realize that all infrared emission components are all connected and light twice, and twice of the also corresponding reception of all receiving elements, realize real dip sweeping coverage rate 100%, the infrared components that corner among Fig. 1 can not occur can not be covered in the dip sweeping process and the situation that must carry out special processing.In other words, adopt technical scheme of the present invention, can eliminate the blind area that dip sweeping detects, discern a plurality of touch points preferably, especially (for example 17 ", 19 " on the small size touch-screen, 22 " etc.) more can significantly improve a plurality of touch points discrimination, improve the effect of using.
Corresponding foregoing circuit structural change, the present invention realizes that the localization method of multiple point touching mainly may further comprise the steps:
A), start scanning generator, respectively initialization and infrared emission component vertical over against the infrared receiver component infrared receiver component relative with inclination, and note the vertical normalized value and/or the inclination initialization value of each infrared receiver component respectively;
B), successively connect and light each infrared emission component, connection simultaneously is vertical with infrared emission component over against locational infrared receiver component, and the output valve and the perpendicular initialization value that read infrared emission component compare;
C), according to each infrared receiver component output valve and the initialization value situation of change of back gained relatively, calculate the possible position coordinates in each touch point;
D), continue scanning, connect successively and light each infrared emission component, connect simultaneously with infrared emission component inclination relative position on infrared receiver component, read with infrared emission component tilt relative receiving element output valve and with the inclination initialization value relatively;
E), according to each infrared receiver component output valve and the inclination initialization value situation of change of back gained relatively, determine the relational expression between touch point actual coordinate X and the Y, the touch point that calculates among the step c may be checked in the coordinate figure substitution relational expression, determine each touch point position coordinates, and coordinate data is delivered to Computer Processing;
F), according to the method for step b to step e, begin new circulation.
Determine touch point X in the step e), relational expression its essence is the position of determining place, touch point straight line between the Y coordinate.Because on whole touch screen, the position of all radiated elements and receiving element all is known and fixing in coordinate system XOY, so the equation of the straight line between any one radiated element and any one reception all is known.Therefore detect by dip sweeping and can determine the touch point on the straight line that is linked to be of that radiated element and receiving element, therefore can determine the X of touch point, the relational expression between the Y coordinate.
Use structure of the present invention and method,, only need the detection judgement of a direction just can realize the multiple point touching location in some occasion.Be difficult to calculate the touch point position coordinate time when using a direction to touch and detecting, can use both direction to detect aggregation of data and judge.For example, when the touch point near corner areas or when a plurality of touch points are close when overlapping phenomenon a zonule, comprehensively judge it is necessary in conjunction with the detection data of both direction.
Multi-point touch locating method of the present invention, to scan to detect and be divided into vertical scanning detection and two processes of dip sweeping detection, in fact, dip sweeping needn't be carried out always, when each touch point position coordinate is determined, and when keeping stablizing, can only carry out vertical scanning and detect, just can discern a plurality of touch points by the movement tendency of judging each touch point like this.About discern the method for a plurality of touch points by the detected touch point movement tendency: the relatively variation of this cycle and the last detected position coordinates quantity of computation period and/or the variation of coordinate values, there is new touch point to add and then registers new touch point information, leave the touch point information that then cancellation has been left if any the touch point; Relatively this cycle and a last detected coordinate values of computation period (x, situation of change y), with coordinate figure (x, y) current position coordinates with registered touch point compares, and judges the movement tendency of touch point; Calculating is also judged the touch point that the position changes, and gives this touch point with up-to-date coordinate figure.At this moment, the step of dip sweeping can be omitted, and can make the refresh rate that touches detection remain on a higher level by such method.
The circuit structure change that process is above-mentioned also uses corresponding multipoint positioning algorithm, infrared touch panel system just can distinguish a plurality of touch points that touch simultaneously, multiple point touching is positioned on the infrared touch panel is achieved.On this basis, further, can determine the mobile trend of each touch point can define different touch operation functions in view of the above according to the situation of change of position coordinates, amplify or reduction operation such as two touch point direction of motion phase antirepresentations; A touch point is motionless, and movement in a curve is done in the another one touch point, and expression is rotated operation or the like, finish the single-point touches system the function that can't finish, all these functions can define flexibly by corresponding application software.
Compare with existing infrared touch technology, the present invention has following beneficial effect:
One, do not need to increase hardware cost, can realize the multiple point touching location.
Two, scanning detection method is simple, does not have complicated sequential corresponding relation between radiating circuit and the receiving circuit, realizes easily on the software.
Three, dip sweeping can cover All Ranges, can improve the accuracy of multiple point touching, and small size is had superiority.
Four, the algorithm of realization multipoint positioning is simpler, touch point position coordinates convenience of calculation, accurate, reliable.
[description of drawings]
Accompanying drawing 2 is infrared touch panel embodiment one synoptic diagram of the present invention;
Accompanying drawing 3 is infrared touch panel embodiment two synoptic diagram of the present invention;
Accompanying drawing 4 is infrared touch panel embodiment three synoptic diagram of the present invention;
Accompanying drawing 5 is schematic flow sheets of multi-point touch locating method of the present invention.
[embodiment]
Fig. 2 is the synoptic diagram of first specific embodiment of the present invention.Among the figure, 201,201,203,204 are mounted in the infrared emission component on the radiating circuit plate, and 205,206,207,208 are mounted in the infrared receiver component on the circuit board for receiving.As can be seen from the figure, the detection side at 201,205 places upwards, infrared emission component and infrared receiver component be vertical over against, and 203, the detection side at 208 places upwards, infrared emission component 203,204 to the deflection of the center of touch-screen certain angle, and the direction of 203 deflection angles is opposite with 204, accordingly, infrared receiver component 207,208 also to screen center's deflection certain angle.Such 203 except vertical with 208 over against, also with 207 tilt relative, 204 then vertical with 207 over against, relative with 208 inclinations, 203,204,207,208 have formed the intersection corresponding relation shown in the figure.This corresponding relation can be taked in the process of installing the method for the certain angle of element deflection to be realized, the size of infrared components deflection angle can be calculated definite in conjunction with the size that touches surveyed area according to the parameter of selected infrared emission component and infrared receiver component; Also can test by experiment, determine according to actual effect.For example, the emission angle nominal value of certain infrared emission component is 35 degree, in fact its emitted energy concentrates in the scope of 0-18 degree, if be used on the touch-screen of 40n, because the operating distance of radiated element and receiving element is far away, in order to guarantee effect preferably, radiated element and receiving element deflection angle can be selected about 12 degree, certainly, the actual effect that also can test is by experiment selected suitable deflection angle.
Adopt circuit structure shown in Figure 2, in each scanning sense cycle, the scanning testing process is divided into two stages.Carrying out the employed vertical scanning of common infrared touch panel principle earlier detects, draw the possible coordinate in each touch point, carrying out dip sweeping again detects, the output valve of judging which receiving element changes and just can determine the touch point on which bar tilts the straight line that relative radiated element and receiving element be linked to be, determine each touch point position coordinates relation, again vertical scanning is detected the possible position coordinate value substitution in touch point that obtains and determine to check in the coordinate relation formula, determine each touch point position coordinate by the dip sweeping detection.So-called touch point coordinate relational expression in fact also is the straight-line equation that relative radiated element and receiving element be linked to be that tilts, and under the definite situation of each parameter of touch-screen, the straight-line equation that every group of tilt relative radiated element and receiving element are linked to be is also determined.Because the mode of the intersection correspondence that adopts, the coverage rate of dip sweeping is better than circuit structure shown in Figure 1.
In addition, adopt the infrared touch panel of circuit structure shown in Figure 2, its master microprocessor can be arranged on the circuit board for receiving, also can be placed on the radiating circuit plate, correspondingly, have 1 to 2 microprocessor on the radiating circuit plate of certain direction, all be arranged on the circuit board for receiving comparatively speaking with the master microprocessor of prior art, laying of master microprocessor is more flexible, satisfies the needs of different structure form touch-screen.Master microprocessor is arranged in after the radiating circuit plate, and dash receiver can have only a microprocessor.
Fig. 3 is the synoptic diagram of second specific embodiment of the present invention.Similar with circuit structure shown in Figure 2,301,301,303,304 are mounted in the infrared emission component on the radiating circuit plate, and 305,306,307,308 are mounted in the infrared receiver component on the circuit board for receiving.The detection side at 301,305 places upwards, infrared emission component 301,302 to the deflection of the center of touch-screen certain angle, the direction of 301 deflection angles is opposite with 302, accordingly, infrared receiver component 305,306 also to screen center's deflection certain angle.Such 301 except vertical with 305 over against, also with 306 tilt relative, 302 then vertical with 306 over against, relative with 305 inclinations, 301,302,305,306 have formed the intersection corresponding relation shown in the figure.The detection side at 303,308 places upwards, infrared emission component and infrared receiver component be vertical over against, equally, in each scanning sense cycle, the scanning testing process is divided into two stages, whole process is similar to circuit structure shown in Figure 2, is not launching description herein.
Adopt Fig. 2 and circuit structure shown in Figure 3, can satisfy the multiple point touching demand of many occasions, and more for the touch point, require higher multiple point touching demand, just need to adopt circuit structure shown in Figure 4.As shown in Figure 4, two detection sides at touch-screen make progress infrared emission component 401,402,403,404 with infrared receiver component 405,406,407,408 all form to intersect corresponding relations, like this two detection sides of touch-screen to all carrying out dip sweeping, the circuit structure shown in Figure 1 of comparing, the coverage rate of dip sweeping can reach 100%, the dip sweeping blind area shown in Fig. 1 can not occur.For simultaneous multiple point touching incident, touch-screen system can detect the possible position coordinates in definite touch point by carrying out a vertical scanning earlier, detect by a dip sweeping then, upwards all declare the relation of touch point coordinate two detection sides, thereby discern each touch point more accurately.
Comprehensive above content please refer to Fig. 5, and multi-point touch locating method of the present invention mainly comprises the steps:
1. the startup scanning generator is distinguished initialization vertically over against the receiving element and the relative receiving element that tilts;
2. connect infrared emission component successively, connect successively vertical with radiated element on the position receiving element, read output valve and with vertical initialization value comparison;
3. according to the situation of change of each infrared receiver component output valve and the relatively back gained of initialization value, calculate the possible position coordinates in touch point;
4. continue scanning, connect successively and light each infrared emission component, connect simultaneously with infrared emission component inclination relative position on infrared receiver component, read with radiated element tilt relative receiving element output valve and with the inclination initialization value relatively;
5. according to each infrared receiver component output valve and the inclination initialization value situation of change of back gained relatively, determine the relational expression between touch point actual coordinate X and the Y, the touch point that calculates in the step 3 may be checked in the coordinate figure substitution relational expression, determine each touch point position coordinates, and coordinate data is delivered to Computer Processing;
6. according to the method for step 2, begin new circulation to step 5.
Determine touch point X in the step 5, relational expression its essence is the position of determining place, touch point straight line between the Y coordinate.Because on whole touch screen, the position of all radiated elements and receiving element all is known and fixing in coordinate system XOY, so the equation of the straight line between any one radiated element and any one reception all is known.Therefore detect by dip sweeping, the output valve of judging which receiving element changes and just can determine the touch point on the straight line that is linked to be of which bar radiated element and receiving element, so can determine the X of touch point, the relational expression between the Y coordinate.
Because the principle of work of infrared touch panel has been a public technology, technology contents such as above-mentioned detection, judgement, calculating all are the contents of program design and mathematical computations, so need not to describe in detail at this again.
In the present embodiment, to scan to detect and be divided into vertical scanning detection and two processes of dip sweeping detection, in fact, dip sweeping needn't be carried out always, when each touch point position coordinate is determined, and when keeping stablizing, only carry out vertical scanning and detect, judge that the movement tendency of each touch point just can be discerned a plurality of touch points.At this moment, the step of dip sweeping can be omitted, and can make the refresh rate that touches detection remain on a higher level like this.
Through above-mentioned calculating, can correctly find each position, touch point, after each touch point position coordinate of identification, just can define various operating functions, the identification operation intention of user according to the movement tendency of each point.Such as, in certain application scenario, two touch point counter motions, amplifieroperation is carried out in expression; A touch point is motionless, and movement in a curve is done in the another one touch point, and expression is rotated operation or the like.These operating functions can be defined flexibly by corresponding application software.
The above only is three embodiment of the present invention, and in fact circuit structure can more flexible way.In addition, the work schedule of infrared emission component and infrared receiver component also can need and a scan period can be divided into the three or more stages if having according to actual adjustment, carries out scanning several times detection more.Therefore protection scope of the present invention is not limited thereto, and those of skill in the art are any to be included within protection domain of the present invention based on non-material change on the technical solution of the present invention.
Claims (9)
1. infrared touch panel, it is characterized in that at least one detection side upwards, infrared emission component and infrared receiver component are all towards the direction deflection of touch screen center, make infrared emission component and infrared receiver component towards relative, form the corresponding relation of intersecting.
2. infrared touch panel as claimed in claim 1 is characterized in that, the infrared receiver component on infrared emission component on the infrared emission sweep circuit and the infrared reception sweep circuit forms the intersection corresponding relation all towards the direction deflection of touch screen center.
3. infrared touch panel as claimed in claim 1 or 2 is characterized in that, its master microprocessor is arranged on circuit board for receiving or the radiating circuit plate.
4. a multi-point touch locating method that adopts infrared touch panel as claimed in claim 1 is characterized in that it comprises the steps:
A), start scanning generator, respectively initialization and infrared emission component vertical over against the infrared receiver component infrared receiver component relative with inclination, and note the vertical normalized value and/or the inclination initialization value of each infrared receiver component respectively;
B), successively connect and light each infrared emission component, connection simultaneously is vertical with infrared emission component over against locational infrared receiver component, and the output valve and the perpendicular initialization value that read infrared emission component compare;
C), according to each infrared receiver component output valve and the initialization value situation of change of back gained relatively, calculate the possible position coordinates in each touch point;
D), continue scanning, connect successively and light each infrared emission component, connect simultaneously with infrared emission component inclination relative position on infrared receiver component, read with infrared emission component tilt relative receiving element output valve and with the inclination initialization value relatively;
E), according to each infrared receiver component output valve and the inclination initialization value situation of change of back gained relatively, determine the relational expression between touch point actual coordinate X and the Y, the touch point that calculates among the step c may be checked in the coordinate figure substitution relational expression, determine each touch point position coordinates, and coordinate data is delivered to Computer Processing.
5. multi-point touch locating method as claimed in claim 4 is characterized in that, according to step b each touch point position coordinates of method cycle detection to step e.
6. multi-point touch locating method as claimed in claim 4, it is characterized in that, when each touch point position coordinate is determined to the method for step e according to step b, and when keeping stablizing, only carry out vertical scanning and detect, discern a plurality of touch points by the movement tendency of judging each touch point.
7. as claim 4 or 5 or 6 described multi-point touch locating methods, it is characterized in that the scanning testing process can be divided into two stages, in half scan period, finishes the vertical scanning testing process; In other half scan period, finish the dip sweeping testing process.
8. multi-point touch locating method as claimed in claim 7 is characterized in that, the infrared emission circuit board of infrared touch panel adopts different sequential, and the infrared receiving circuit plate adopts and the identical sequential of corresponding infrared emission circuit board.
9. multi-point touch locating method as claimed in claim 7 is characterized in that, the infrared receiving circuit plate of infrared touch panel adopts different sequential, and the infrared emission circuit board adopts and the identical sequential of corresponding infrared receiving circuit plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100257053A CN101226446B (en) | 2008-01-09 | 2008-01-09 | Infrared touch panel and multi-point touch locating method |
| PCT/CN2008/000847 WO2008154792A1 (en) | 2007-06-15 | 2008-04-25 | Infrared touch screen and multi-point touch positioning method |
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| CN2008100257053A CN101226446B (en) | 2008-01-09 | 2008-01-09 | Infrared touch panel and multi-point touch locating method |
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| CN101226446B true CN101226446B (en) | 2010-10-27 |
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| CN106249968B (en) * | 2016-07-27 | 2020-05-15 | 青岛海信电器股份有限公司 | Scanning method and device |
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| CN1952865A (en) * | 2006-08-31 | 2007-04-25 | 广东威创日新电子有限公司 | Infrared touch apparatus of varied-frequency infrared tube in adjacent infrared module |
| CN101071356A (en) * | 2007-06-15 | 2007-11-14 | 广东威创日新电子有限公司 | Infrared touch screen and its multi-point touch positioning method |
| CN201142069Y (en) * | 2008-01-09 | 2008-10-29 | 广东威创视讯科技股份有限公司 | infrared touch panel |
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| CN1952865A (en) * | 2006-08-31 | 2007-04-25 | 广东威创日新电子有限公司 | Infrared touch apparatus of varied-frequency infrared tube in adjacent infrared module |
| CN101071356A (en) * | 2007-06-15 | 2007-11-14 | 广东威创日新电子有限公司 | Infrared touch screen and its multi-point touch positioning method |
| CN201142069Y (en) * | 2008-01-09 | 2008-10-29 | 广东威创视讯科技股份有限公司 | infrared touch panel |
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