CN100485595C - Touch panel device and multi-point touch locating method - Google Patents
Touch panel device and multi-point touch locating method Download PDFInfo
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- CN100485595C CN100485595C CNB2007100293638A CN200710029363A CN100485595C CN 100485595 C CN100485595 C CN 100485595C CN B2007100293638 A CNB2007100293638 A CN B2007100293638A CN 200710029363 A CN200710029363 A CN 200710029363A CN 100485595 C CN100485595 C CN 100485595C
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
- G06F3/04883—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures for inputting data by handwriting, e.g. gesture or text
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/048—Indexing scheme relating to G06F3/048
- G06F2203/04808—Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model discloses a touch screen device and a positioning method for the multi-point touch. The infrared touch sensing circuits of the infrared components are distributed along the horizontal and the vertical directions, so as to constitute the infrared touch detection grid which is used to ascertain the possible positions of a plurality of the touch points in the detection area. The pick-up head apparatus is arranged at the position which is paralleled with the plane of the infrared touch examination grid, so that the entire detection area can be shot to ascertain the position of a plurality of the touch points in the detection area. The data computing element can respectively receive the data as obtained by the infrared touch sensing circuit and the pick-up head apparatus. After the comparative analysis, the accurate position coordinates of the defined touch points are transferred to the computer. The utility model has the advantages of simple structure and wide range of use, so that the touch screen device can realize the multi-point touch positioning as well as the single-point touch and the multi-point touch simultaneously. Therefore, the touch screen device can be used in more fields and occasions. Also, the multi-point positioning can be conveniently achieved and the calculation of the touch point position coordinates can achieve the convenience, the accuracy and the reliability.
Description
Technical field
The present invention relates to a kind of touch-screen, particularly a kind of touch-screen and the multi-point touch locating method thereof that can distinguish a plurality of touch points and can operate simultaneously.
Background technology
Touch-screen is used widely in more field as a kind of simpler, ripe human-computer interaction device, and existing touch screen technology mainly contains several forms such as resistance, electric capacity, camera, infrared ray.Infrared touch panel has obtained development faster as the interactive device that a kind of production technology is simple, production cost is lower.The basic structure of infrared touch panel, be install in a certain order a display surface edge some to infrared emission and infrared receiver component.It is right that these emissions and infrared receiver component are formed the emission reception according to mode one to one, edge along display surface constitutes a mutually perpendicular emission receiving array, under the control of microcomputer system, connect each in a certain order respectively to emission and infrared receiver component, detect each whether the Infrared between infrared emission and the infrared receiver component is blocked, judge whether have touch event to take place with this.Detailed principle all has description in U.S. Pat 5162783 and domestic many patents.
Existing Infrared touch screen systems, light constitutes lattice structure at display surface, detects when touching, and determines to touch the grid node position that takes place and just can calculate the position coordinates that touch event takes place.This touch detecting pattern makes existing infrared touch panel in the given period, detection system receives only the coordinate data of one group of unique position, therefore when having only a touch point, touch-screen can operate as normal, when operating simultaneously for two or more touch points, system is with the position coordinates of miscount, and the touch place that causes reporting is not the place of actual touch.The touch-screen of existing other principle, as resistance-type, capacitive touch screen etc., its coordinate Calculation method and infrared touch panel are similar, have identical problem.
For above-mentioned reasons, existing touch screen technology need use the occasion of multiple point touching to lose efficacy at some, and for example many people play simultaneously, many people's while Writing-paintings etc., great like this use field of having limited touch-screen.Had at present some solutions for example to discern a plurality of touch points, but relatively moved for not having between a plurality of touch points by the sequencing that the senses touch incident takes place, do not have yet the shape sizes values of touch point can the situation of reference under, judge by accident easily.
In view of present touch-screen system above shortcomings, provide a kind of and can realize the multiple point touching location and reduce structure and the method judged by accident to be necessary in fact.
Summary of the invention
The object of the present invention is to provide a kind of touch panel device that can discern two or more touch operation.
Another object of the present invention provides a kind ofly uses above-mentioned touch-screen to realize that multiple spot touches the multi-point touch locating method that also can report effective touch location simultaneously.
For achieving the above object, the present invention by the following technical solutions:
A kind of touch panel device, it comprises: the infrared touch testing circuit that is provided with infrared components of on horizontal vertical both direction, arranging, constitute infrared touch and detect grid, be used for determining respectively possible position in surveyed area, a plurality of touch points; Can photograph the cam device of whole surveyed area, be used for determining relative position in surveyed area, a plurality of touch points; Can receive the data computation unit of the data that infrared touch testing circuit and cam device obtained respectively, the accurate position coordinates with the touch point determined after the comparative analysis transfers in the computing machine.
In touch panel device of the present invention, described cam device is positioned on the corner that of surveyed area can photograph fired infra-red component, can utilize Infrared that infrared emission component sends light source as a setting like this, make cam device obtain suitable touch point image.Certainly, also can set up necessary auxiliary lighting apparatus, particularly, make cam device can obtain suitable image detecting when on the position that raster plane parallels cam device being installed with infrared touch.
Adopt touch panel device of the present invention, when operate on touch-screen a touch point, because blocking of touch point causes the output valve of the infrared receiver component of position, touch point to change, the infrared touch testing circuit detects this variation just can judge touch point position; When operate on touch-screen two or more touch points, at synchronization, the infrared receiver component output valve that the infrared touch testing circuit can detect a plurality of positions changes, according to these data, can be combined into a plurality of possible touch position coordinates, at this moment, the infrared touch testing circuit can be calculated possible touch point position coordinates and be can not determine the accurate position of each touch point.Meanwhile, the cam device that parallels with the infrared touch detection plane can be noted the relative position of each touch point on touch-screen, they be distributed in the angled straight line of the optical axis of cam device on, can determine the relation between the horizontal ordinate of each touch point by computing formula; The possible position coordinates in touch point that obtains in conjunction with the infrared touch testing circuit, the touch point coordinate relation that the horizontal ordinate of each possible touch point and cam device record is obtained is analyzed, find out the coordinate figure combination of satisfying horizontal ordinate relation, so just can determine the accurate position coordinates of each touch point.
The present invention realizes that the localization method of multiple point touching mainly may further comprise the steps:
1. start scanning, finish the normalization and/or the initialization of each infrared receiver component; Open cam device simultaneously;
2. in a scan period, connect infrared emission component successively, read the infrared receiver component output valve, and compare with normalized value and/or initialization value; If infrared receiver component output valve and normalized value and/or initialization value are inconsistent, then judging has touch event that this position of mark takes place;
3. the possible position coordinates of each touch point is judged and calculated to the touch event occurrence positions of noting according to infrared touch testing circuit in the scan period;
4. according to each touch point position of cam device record, the formula below using calculates the relation between the horizontal ordinate in each touch point:
Y＝X*tan?θ，
Wherein, X represents the touch point apart from the distance of cam device at transverse direction, and Y represents that the touch point arrives the distance of cam device at longitudinal direction, and θ represents the angle between touch point and cam device line and the horizontal line;
5. in the data computation unit, obtain in step 3 each group may coordinate figure with step 4 in the touch point coordinate concern and be analyzed, find out the coordinate combination of satisfying relational expression in the step 4, determine the coordinate of each touch point, and coordinate data is delivered to Computer Processing;
6. repeating step 2 begins new circulation to step 5.
Above-mentioned steps is the basic step of multipoint positioning method of the present invention, and the order of each step can be different according to describing difference, and the quantity of step also can increase and decrease as required.Step 3 for example, the order of step 4 can change, and also can carry out simultaneously.
In the step 4, it is selected that datum line is a horizontal line to weigh the touch point relative position.In fact, the description of angle θ can be selected different benchmark, for example can select camera optical axis or perpendicular line as benchmark, at this moment, the form of computing formula may be different, the implication of each parametric representation will change thereupon in the formula, but not variation of the essence of calculating all is the relations that characterize between the horizontal ordinate in touch point.
In the listed formula of step 4, when θ is 0 or 90 °, expression has transverse edge or the longitudinal edge of touch point at touch-screen, at this moment, and should be definite again having determined the definite position of other touch point after at the touch point at touch-screen edge position coordinates.
Adopt touch panel device of the present invention, and use multipoint positioning method of the present invention, touch-screen system just can be distinguished a plurality of touch points that touch simultaneously, multiple point touching is positioned on the touch-screen 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 single-point touches technology, the present invention has following beneficial effect:
One, touch panel device is simple, does not need too much input just can realize the multiple point touching location.
Two, range of application is more extensive.Can realize single-point touches, can realize multiple point touching again, finish the difficult many people that realize of existing touch-screen operating function simultaneously, can be applied to more field and occasion.
Three, the algorithm of realization multipoint positioning is simpler, touch point position coordinates convenience of calculation, accurate, reliable.
Description of drawings
Fig. 1 is an embodiment of the invention structural representation;
Fig. 2 is that a plurality of points of the embodiment of the invention touch synoptic diagram;
Fig. 3 is that embodiment of the invention touch point relative position calculates synoptic diagram;
Fig. 4 is an embodiment of the invention multi-point touch locating method schematic flow sheet;
Fig. 5 is that the embodiment of the invention detects two overlapping touch point synoptic diagram.
Embodiment
Fig. 1 is the structural representation of a specific embodiment of the present invention.Among the figure, the 101st, the radiating circuit plate of infrared emission component is installed, the 102nd, the infrared emission component on the radiating circuit plate, 104 are mounted in the infrared receiver component on the circuit board for receiving 103.As shown in the figure, the infrared touch testing circuit that constitutes by infrared emission circuit board and infrared receiving circuit plate be arranged in surveyed area 107 around, form infrared touch and detect grid 106, when operate in surveyed area the touch point, because blocking of touch point, the output valve of infrared receiver component is changed, and in view of the above, the infrared touch testing circuit can mark the possible position of touch point.Cam device 105 is installed in the upper right corner of surveyed area, parallel with the infrared touch detection plane, by adjusting the position and the angle of installing, make cam device can photograph whole surveyed area, simultaneously, camera is installed is photographed infrared emission component, can utilize light that infrared emission component sends light source as a setting like this, obtain the suitable image in touch point in this position.When the touch point when surveyed area is operated, cam device can photograph the position of touch point at surveyed area, can determine the relation between the horizontal ordinate of touch point by computing formula.Like this, the touch point that the touch point possible position that infrared circuit calculates and cam device obtain in the position data of surveyed area in the data computation unit through after the comprehensive analysis processing, calculate the accurate position coordinates of each touch point, again coordinate data is delivered to Computer Processing.
Below in conjunction with Fig. 2 a plurality of touch points identifying is described.206,207,208,209 is four different touch points, 202 are mounted in the infrared emission component on the radiating circuit plate 201,204 are mounted in the infrared receiver component on the circuit board for receiving 203, the 205th, cam device, when operated on touch-screen simultaneously each touch point, the infrared touch testing circuit was according to the variation of infrared receiver component output numerical value, according to these data, can be combined into a plurality of possible touch position coordinates,, also comprise false touch point position as shown in phantom in FIG. except the position, touch point of reality, at this moment, the infrared touch testing circuit can be calculated possible touch point position coordinates and be can not determine the accurate position of each touch point.As shown in Figure 2, cam device 205 is in the work of infrared touch testing circuit, note the relative position of each touch point on touch-screen, they be distributed in the angled straight line of the optical axis of cam device on, can determine the relation between the horizontal ordinate of each touch point by computing formula.Each that the infrared touch testing circuit is obtained may the touch point the touch point coordinate that obtains of horizontal ordinate and cam device record concern and be analyzed, find out the coordinate figure combination of satisfying horizontal ordinate relation, so just can determine the accurate position coordinates of each touch point.
Fig. 3 is that each touch point relative position calculates synoptic diagram, each touch point that the cam device record obtains is as 301,302,303, shown in 304, in the image that cam device obtains, by artificial division, the horizontal line on plane, surveyed area place is decided to be 0 degree, perpendicular line is decided to be 90, optical axis place direction is decided to be 45 degree, and the position of each touch point in the image that camera is clapped can be described as the angle of each place, touch point straight line and horizontal line, perpendicular line, optical axis or other straight line by the illustrated conversion in the right like this.305,306,307,308 represent touch point 301 respectively among Fig. 3, the straight line at 302,303,304 places and horizontal angle, so just can determine the relative position of each touch point on touch-screen, further, use following formula can determine relation between the horizontal ordinate in each touch point.
Y＝X*tan?θ，
Wherein, X represents that the touch point is apart from the distance of cam device at transverse direction, Y represents that the touch point arrives the distance of cam device at longitudinal direction, θ represents the angle between touch point and cam device line and the horizontal line, in Fig. 3, be 305,306,307,308, in above-mentioned formula, when θ is 0 or 90 °, expression has transverse edge or the longitudinal edge of touch point at touch-screen, at this moment, if determine, should after having determined the definite position of other touch point, carry out again at the touch point at touch-screen edge position coordinates.
In above-mentioned formula, it is selected that datum line is a horizontal line to weigh the touch point relative position.In fact, the description of angle θ can be selected different benchmark, for example can select the camera optical axis as benchmark, also can select perpendicular line or other straight line as datum line, this moment, the form of formula may be different, and the implication of each parametric representation also may change thereupon in the formula, but no matter how formula changes, the essence of its calculating does not change, and all is the relations that characterize between the horizontal ordinate in touch point.
Comprehensive above content with reference to Fig. 4, can draw the process of embodiment of the invention multiple point touching implementation method, and it mainly comprises the steps:
1. start scanning, finish the normalization and/or the initialization of each infrared receiver component; Open cam device simultaneously;
2. in a scan period, connect infrared emission component successively, read the infrared receiver component output valve, and compare with normalized value and/or initialization value; If infrared receiver component output valve and normalized value and/or initialization value are inconsistent, then judging has touch event that this position of mark takes place;
3. the possible position coordinates of each touch point is judged and calculated to the output valve of noting according to infrared touch testing circuit in scan period situation about changing;
4. according to each touch point position of cam device record, the formula below using calculates the relation between the horizontal ordinate in each touch point:
Y＝X*tan?θ，
Wherein, X represents the touch point apart from the distance of cam device at transverse direction, and Y represents that the touch point arrives the distance of cam device at longitudinal direction, and θ represents the angle between touch point and cam device line and the horizontal line;
5. touch point coordinate relation is analyzed in each group possibility coordinate figure and the step 4 with obtaining in the step 3, finds out the coordinate combination of satisfying relational expression in the step 4, determines the coordinate of each touch point, and coordinate data is delivered to Computer Processing.
6. repeating step 2 begins new circulation to step 5.
In the step 4, it is selected that datum line is a horizontal line to weigh the touch point relative position.In fact, the description of angle θ can be selected different benchmark, for example can select camera optical axis or perpendicular line as benchmark, then wherein the implication of each parametric representation of formula with different, but the essence of calculating does not change, and all is the relations that characterize between the horizontal ordinate in touch point.
In the listed formula of step 4, when θ is 0 or 90 °, expression has transverse edge or the longitudinal edge of touch point at touch-screen, at this moment, and should be definite again having determined the definite position of other touch point after at the touch point at touch-screen edge position coordinates.
Fig. 5 is the synoptic diagram that the embodiment of the invention detects two overlapping touch points, among the figure, 501,502 two image spaces of touch point in cam device 505 overlap, the straight line at 501 and 502 places is same straight lines, in this case, the touch point possible position coordinate that the infrared touch testing circuit calculates comprises 501,502,503,504 totally four, and satisfy the horizontal ordinate relation in touch point that cam device determines have only two, can easier determine the accurate position coordinates of touch point 501,502 thus.
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 an one embodiment of the invention; in fact adopt a plurality of cam devices also can implement the present invention preferably; after being aided with the necessary background light source; the installation site of cam device can be selected flexibly; the sequence of steps of multipoint positioning method can be changed; the touch point angular divisions can be selected different datum line or the like; 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 (7)
1, a kind of touch panel device is characterized in that it comprises:
The infrared touch testing circuit that is provided with infrared components of arranging on horizontal vertical both direction constitutes infrared touch and detects grid, is used for determining respectively possible position in surveyed area, a plurality of touch points;
Can photograph the cam device of whole surveyed area, be used for determining relative position in surveyed area, a plurality of touch points;
The data computation unit can receive the data that infrared touch testing circuit and cam device are obtained respectively, and the accurate position coordinates with definite touch point after the comparative analysis transfers in the computing machine.
2, a kind of touch panel device according to claim 1 is characterized in that: described cam device is positioned on the corner that of surveyed area can photograph fired infra-red component.
3, a kind of touch panel device according to claim 1 is characterized in that: described cam device is positioned on the position that of detecting with infrared touch that raster plane parallels can photograph whole surveyed area.
4, according to claim 1,2 or 3 described a kind of touch panel devices, it is characterized in that: it also is provided with auxiliary lighting apparatus.
5, a kind of localization method that uses touch panel device as claimed in claim 1 to realize multiple point touching is characterized in that comprising following steps:
The normalization and/or the initialization of each infrared receiver component are finished in a, startup scanning; Open cam device simultaneously;
B, in a scan period, connect infrared emission component successively, read the infrared receiver component output valve, and with normalized value and/or initialization value relatively; If infrared receiver component output valve and normalized value and/or initialization value are inconsistent, then judging has touch event that this position of mark takes place;
C, according to the touch event occurrence positions that infrared touch testing circuit in the scan period is noted, judge and calculate the possible position coordinates of each touch point;
D, according to each touch point position of cam device record, the formula below using calculates the relation between the horizontal ordinate in each touch point:
Y＝X*tanθ，
Wherein, X represents the touch point apart from the distance of cam device at transverse direction, and Y represents that the touch point arrives the distance of cam device at longitudinal direction, and θ represents the angle between touch point and cam device line and the datum line;
E, in the data computation unit with obtain among the step c each group may coordinate figure with steps d in the touch point coordinate concern and be analyzed, find out the coordinate combination of satisfying relational expression in the steps d, determine the coordinate of each touch point, and coordinate data is delivered to Computer Processing;
F, repeating step b to e begin new circulation.
6, the localization method of multiple point touching according to claim 5 is characterized in that: described step c and steps d are docile and obedient preface or backward or are carried out simultaneously
7, according to the localization method of claim 5 or 6 described multiple point touchings, it is characterized in that: described datum line is a horizontal line, perhaps perpendicular line, perhaps camera optical axis.
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| CN104834411A (en) * | 2015-03-11 | 2015-08-12 | 河北华发通信技术有限公司 | Rapid scanning method for infrared touch screen |
| CN107943340B (en) * | 2017-11-07 | 2020-12-04 | 海信视像科技股份有限公司 | Touch screen scanning detection method and device |
-
2007
- 2007-07-25 CN CNB2007100293638A patent/CN100485595C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011079592A1 (en) * | 2009-12-28 | 2011-07-07 | 武汉全真光电科技有限公司 | Projection display system and desktop computer |
| CN101833396A (en) * | 2010-04-26 | 2010-09-15 | 苏州佳世达电通有限公司 | System and method for carrying out multi-point touch through single-point touch panel |
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| CN101110008A (en) | 2008-01-23 |
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