CN102141864B - Acoustic wave type multi-touch detection method - Google Patents
Acoustic wave type multi-touch detection method Download PDFInfo
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- CN102141864B CN102141864B CN 201010110425 CN201010110425A CN102141864B CN 102141864 B CN102141864 B CN 102141864B CN 201010110425 CN201010110425 CN 201010110425 CN 201010110425 A CN201010110425 A CN 201010110425A CN 102141864 B CN102141864 B CN 102141864B
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Abstract
The invention relates to an acoustic wave type multi-touch detection method which comprises the steps: adopting the time difference generated by successively touching different fingers by a user; and sequentially detecting the finger touch touched by the user in sequence at different times during the different detection periods. Through taking a previously-detected touch coordinate as a coordinate calculation basis of a subsequently-detected touch coordinate, the touch of different fingers on an acoustic wave type touch control panel can be effectively determined so as to achieve the purpose of judging which touch is real.
Description
Technical field
The invention relates to a kind of contact panel, particularly about a kind of acoustic wave type multi-touch detection method.
Background technology
Existing contact panel technology has: resistance-type, surface capacitance type, projected capacitive, electromagnetic type, optical profile type, projection, acoustic wave etc.Various contact panel respectively has its relative merits.Wherein, the acoustic wave contact panel since its need not be actual press, therefore, the use problem of resistance of non-resistance formula contact panel.That is it uses tolerance splendid.In addition, acoustic wave has the advantage that realizes multi-point touch, becomes another selection scheme of multi-point touch.
Below, with the touch detection technology of explanation acoustic wave contact panel.Please refer to Figure 1A, it is 2 touch detection Y-axis of acoustic wave contact panel coordinate detecting synoptic diagram of prior art.The acoustic wave contact panel is to use transmitter 11,12 to launch respectively the first sound wave of Y-axis with the second sound wave of X-axis allows receiver 13,14 receive respectively the ultrasonic that is reflected by reflecting plate 15,16,17,18, and the reflection ultrasonic sequential that is blocked of foundation is confirmed the position touched again.Among Figure 1A, be transmitter 11 emission ultrasonics after, after reflecting plate 15,17 reflections, the situation that is received by receiver 14.In this embodiment, two touch points P1, P2 are arranged simultaneously.Receiver 14 will receive different blocking-up signals within a scan period, and judges that two touch points are arranged.
Then, please refer to Figure 1B, it is 2 touch detection X-axis of acoustic wave contact panel coordinate detecting synoptic diagram of prior art.In Figure 1B, after it is transmitter 12 emission ultrasonics, after reflecting plate 16,18 reflections, by the situation of receiver 13 receptions.In this embodiment, two touch points P1, P2 are arranged simultaneously.Receiver 13 will receive different blocking-up signals within a scan period, and judges that two touch points are arranged.
Then, please refer to Fig. 1 C, it goes out X, Y-axis coordinate synoptic diagram for 2 touch detection actual computation of acoustic wave contact panel of prior art.By the receiver 14 of Figure 1A, 1B, 13 received data, because it obtains respectively Y-axis (Y1, Y2) and X-axis (X1, X2) coordinate, therefore, COMPREHENSIVE CALCULATING touch coordinate out in fact, to become the touch coordinate of Fig. 1 C, that is, the coordinate of touch points P1～P4 representative, be respectively P1 (X1, Y1), P2 (X2, Y2), P3 (X1, Y2), P4 (X1, Y2).Above prior art problem is, the touch points of exporting in contact panel, owing to be respectively the coordinate of Y-axis and X-axis, thereby can produce the problem of ghost (P3, P4).The problem that the scan mode that this problem is the acoustic wave contact panel must be faced.
Summary of the invention
For solving the problem of above prior art, the invention provides a kind of multi-touch detection method of acoustic wave contact panel, may further comprise the steps: detect first of acoustic wave contact panel in the period 1 and touch, calculate the first initial contact coordinate of the first touching; Detect first touching and the second touching of acoustic wave contact panel second round, calculate the first touching and touch in the first initial coordinate group of first direction and the second initial coordinate group of second direction with second; And, determine second the second initial contact coordinate of touching according to the first initial coordinate group, the second initial coordinate group and the first initial contact coordinate.
Below in embodiment, be described in detail detailed features of the present invention and advantage; its content is enough to make anyly to be familiar with person skilled and to understand technology contents of the present invention and implement according to this; and according to the disclosed content of this instructions, protection domain and accompanying drawing, anyly be familiar with person skilled and can understand easily purpose and the advantage that the present invention is correlated with.
Description of drawings
Figure 1A: 2 touch detection Y-axis of acoustic wave contact panel coordinate detecting synoptic diagram of prior art;
Figure 1B: 2 touch detection X-axis of acoustic wave contact panel coordinate detecting synoptic diagram of prior art;
Fig. 1 C: 2 touch detection actual computation of the acoustic wave contact panel of prior art go out X, Y-axis coordinate synoptic diagram;
Fig. 2 A: the Y-axis detecting synoptic diagram that acoustic wave type multi-touch detecting of the present invention is first;
Fig. 2 B: the X-axis detecting synoptic diagram that acoustic wave type multi-touch detecting of the present invention is first;
Fig. 2 C: two point coordinate synoptic diagram of acoustic wave type multi-touch detecting of the present invention detecting after first in advance touching;
Fig. 2 D: the second point X-axis coordinate synoptic diagram of acoustic wave type multi-touch detecting of the present invention detecting after first in advance touching;
Fig. 2 E: acoustic wave type multi-touch of the present invention is detected two point coordinate synoptic diagram;
Fig. 3: the first embodiment of acoustic wave type multi-touch detection method process flow diagram of the present invention;
Fig. 4: the second embodiment of acoustic wave type multi-touch detection method process flow diagram of the present invention;
Fig. 5: the 3rd embodiment of acoustic wave type multi-touch detection method process flow diagram of the present invention; And
Fig. 6: the 4th embodiment of acoustic wave type multi-touch detection method process flow diagram of the present invention.
Symbol description
10 acoustic wave contact panels 11,12 transmitters
13,14 receivers 15,16,17,18 reflecting plates
P1, P2, P3, P4 touch points
Embodiment
The present invention solves the touch detection problem of prior art, to see through the user to take successively to touch the mistiming that different fingers produces, in the different detecting cycles, for example, take a width of cloth (frame) as once detecting time, sequentially can detect user's different time the finger touches of touching sequentially.So, can confirm effectively that difference points the touching on the acoustic wave contact panel, judge that whichever is the purpose of real touching and reach.
Please refer to Fig. 2 A, 2B, Fig. 2 A is the Y-axis detecting synoptic diagram of first of acoustic wave type multi-touch detecting of the present invention, and Fig. 2 B is the X-axis detecting synoptic diagram of first of acoustic wave type multi-touch detecting of the present invention.At very first time point, when touch points P1 touched, ultrasonic contact panel 10 can detect the touch coordinate (X1, Y1) of touch points P1 easily.
At the second time point, during touch points P2 touching ultrasonic contact panel 10, four touch coordinate that originally integrated will be confirmed because of touch points P1, and can see through the coordinate of touch points P1 so that the coordinate of touch points P2 can be judged really, and do not produce the effect of ghost.Please refer to Fig. 2 C, it is the second point Y-axis coordinate synoptic diagram of acoustic wave type multi-touch detecting of the present invention detecting after first in advance touching; Fig. 2 D, it is the second point X-axis coordinate synoptic diagram of acoustic wave type multi-touch detecting of the present invention detecting after first in advance touching.Via first judgement of assisting second point prejudging, in fact the touch coordinate of gained can be such as Fig. 2 E those shown, and it detects two point coordinate synoptic diagram for acoustic wave type multi-touch of the present invention.
So, by the touch points P1 coordinate of detecting first, eliminate after the factor of the obtained touch points P1 coordinate of the second time point, can obtain the coordinate of touch points P2.So, original ghost problem and achieving a solution.Same method is used for the touch detection of the complex points such as 3 points, 4 points, at 5, that is, take the touch points that occurs first as benchmark, as many touch points reference of rear generation, and obtain accurately touch points coordinate.
Below, the method that acoustic wave type multi-touch of the present invention is detected will be described in the mode of method flow diagram.
Please refer to Fig. 3, it is the first embodiment of acoustic wave type multi-touch detection method process flow diagram of the present invention, and it has illustrated the method for detecting that produces successively 2 touchings.
Step S21: detect first of acoustic wave contact panel in the period 1 and touch, calculate the first initial contact coordinate of the first touching.That is, when the period 1, the first sound wave of the first direction that is sequentially provided according to the acoustic wave contact panel and the second sound wave of second direction, obtain respectively the first direction (for example Y-axis) of the first touching and the first initial contact coordinate of second direction (for example X-axis), for example (X1, Y1).In the cycle of each detecting touch points, be run-down first direction and second direction, and calculate the time interval of its touch coordinate.
Step S22: detect first touching and the second touching of acoustic wave contact panel second round, calculate the first touching and touch in the first initial coordinate group of first direction and the second initial coordinate group of second direction with second.When second round, there are two touchings to occur, be respectively the first touching and the second touching, the first sound wave of the first direction that is sequentially provided according to the acoustic wave contact panel and the second sound wave of second direction can obtain respectively the first initial coordinate group, for example (X1 of first direction (for example Y-axis), X2), the second initial coordinate group, for example (Y1, Y2) with second direction.
Step S23: the second initial contact coordinate that determines the second touching according to the first initial coordinate group, the second initial coordinate group and the first initial contact coordinate.That is, the first initial coordinate group according to first direction (for example Y-axis), for example (X1, X2) is with the second initial coordinate group of second direction, (Y1 for example, Y2), with the first initial contact coordinate (X1, Y1), can determine the second correct initial contact coordinate (X2, Y2) of the second touching.
Step S24: detect the first touching and the second touching that the acoustic wave contact panel continues in the period 3, calculate the first touching and second that continues and touch in first of first direction second of set of coordinates and the second direction set of coordinates that continues that continues.When the period 3, identical with second round, have equally two touchings to occur, it is the first touching and the touching that continues of the second touching, the first sound wave of the first direction that is sequentially provided according to the acoustic wave contact panel and the second sound wave of second direction, can obtain respectively first of first direction (for example Y-axis) set of coordinates that continues, for example (X3, X4) is with second of the second direction set of coordinates that continues, for example (Y3, Y4).
Step S25: according to the first second touch coordinate that continues that continues that set of coordinates, second continues that set of coordinates and the first initial contact coordinate, the second initial contact coordinate determine to continue first of the first touching of continuing touch coordinate and second touches.That is, according to first of first direction (for example Y-axis) continue set of coordinates, for example (X3, X4), with second of second direction continue set of coordinates, for example (Y3, Y4), with the first initial contact coordinate (X1, Y1), the second initial contact coordinate (X2, Y2), the first touch coordinate (X3 that continues that first touching that can determine to continue, the second touching are correct, Y3), second touch coordinate (X4, Y4) that continues.In the touching that continues, (X1, Y1) approaches with the distance of (X3, Y3), and (X2, Y2) is approaching with the distance of (X4, Y4), therefore, can determine that it is the correct touch coordinate that continues.
Step S26: according to the first initial contact coordinate, the second initial contact coordinate and first touch coordinate, second touch coordinate that continues that continues, calculate the first touching and second mobile trend of touching.Obtain correct touch coordinate, can confirm the first touching and the translational speed of the second touching and the parameter of direction.
Step S27: determine a gesture according to mobile trend.For example, the different gesture of amplifying, dwindle, slide etc.
Please refer to Fig. 4, it is the second embodiment of acoustic wave type multi-touch detection method process flow diagram of the present invention, and it has illustrated the method for detecting that sequentially produces 3 touchings.
Step S31: detect first of acoustic wave contact panel in the period 1 and touch, calculate the first initial contact coordinate of the first touching.With step S21.
Step S32: detect first touching and the second touching of acoustic wave contact panel second round, calculate the first touching and touch in the first initial coordinate group of first direction and the second initial coordinate group of second direction with second.With step S22.
Step S33: the second initial contact coordinate that determines the second touching according to the first initial coordinate group, the second initial coordinate group and the first initial contact coordinate.With step S23.
Step S34: the first touching, second that detects this acoustic wave contact panel in the period 3 is touched and the 3rd touching, and calculating the first touching, the second touching and the 3rd are touched in the 3rd initial coordinate group of first direction and the 4th initial coordinate group of second direction.The similar step S32 of this step when the period 3, can detect the 3rd initial coordinate group, for example (X1 of the first direction (Y-axis) of 3 touchings, X2, X3), with the 4th initial coordinate group of second direction (X-axis), for example (Y1, Y2, Y3).
Step S35: one the 3rd initial contact coordinate that determines the 3rd touching according to the 3rd initial coordinate group, the 4th initial coordinate group and the first initial contact coordinate, the second initial contact coordinate.According to the 3rd initial coordinate group (X1, X2, X3) with the 4th initial coordinate group (Y1, Y2, Y3) combinatory possibility and acquired the first initial contact coordinate (X1, Y1), the second initial contact coordinate (X2, Y2), can determine the 3rd initial contact coordinate (X3, Y3).
Step S36: detect the first touching, the second touching and the 3rd touching that the acoustic wave contact panel continues in the period 4, calculate the first touching, the second touching and the 3rd that continue and touch in first of first direction second of set of coordinates and the second direction set of coordinates that continues that continues.When the period 4, identical with the period 3, there are equally three touchings to occur, it is the first touching, the second touching and the 3rd touching that continues of touching, the first sound wave of the first direction that is sequentially provided according to the acoustic wave contact panel and the second sound wave of second direction can obtain respectively first of first direction (for example Y-axis) continue set of coordinates, for example (X4, X5, X6), with second of second direction continue set of coordinates, for example (Y4, Y5, Y6).
Step S37: according to the first the 3rd touch coordinate that continues that continues that set of coordinates, second continues that set of coordinates and the first initial contact coordinate, the second initial contact coordinate determine to continue first of the first touching of continuing second of touch coordinate, the second touching continue that touch coordinate and the 3rd touches.That is, according to first of first direction (for example Y-axis) set of coordinates (X4 that continues, X5, X6) with the second set of coordinates (Y4 that continues of second direction, Y5, Y6), with the first initial contact coordinate (X1, Y1), the second initial contact coordinate (X2, Y2), the 3rd initial contact coordinate (X3, Y3), first touch coordinate (the X4 that continues that first touching that can determine to continue, the second touching, the 3rd touching are correct, Y4), second touch coordinate (X5, Y5), the 3rd touch coordinate (X6, Y6) that continues that continues.In the touching that continues, (X1, Y1) approaches with the distance of (X4, Y4), (X2, Y2) approaches (X3 with the distance of (X5, Y5), Y3) distance with (X6, Y6) approaches, and therefore, can determine that it is the correct touch coordinate that continues.
Step S38: according to the first initial contact coordinate, the second initial contact coordinate, the 3rd initial contact coordinate and first touch coordinate, second touch coordinate, the 3rd touch coordinate that continues that continues that continues, calculate the first touching, the second touching and the 3rd mobile trend of touching.Obtain correct touch coordinate, can confirm the first touching, the second touching and the translational speed of the 3rd touching and the parameter of direction.
Step S39: determine a gesture according to mobile trend.For example, the different gesture of amplifying, dwindle, slide etc.
Please refer to Fig. 5, it is the 3rd embodiment of acoustic wave type multi-touch detection method process flow diagram of the present invention, and it has illustrated and has produced the method for detecting that 4 touchings sequentially occur.
Step S41: detect first of acoustic wave contact panel in the period 1 and touch, calculate the first initial contact coordinate of the first touching.With step S31.
Step S42: detect first touching and the second touching of acoustic wave contact panel second round, calculate the first touching and touch in the first initial coordinate group of first direction and the second initial coordinate group of second direction with second.With step S32.
Step S43: the second initial contact coordinate that determines the second touching according to the first initial coordinate group, the second initial coordinate group and the first initial contact coordinate.With step S33.
Step S44: the first touching, second that detects this acoustic wave contact panel in the period 3 is touched and the 3rd touching, and calculating the first touching, the second touching and the 3rd are touched in the 3rd initial coordinate group of first direction and the 4th initial coordinate group of second direction.The similar step S42 of this step when the period 3, can detect the 3rd initial coordinate group, for example (X1 of the first direction (Y-axis) of 3 touchings, X2, X3), with the 4th initial coordinate group of second direction (X-axis), for example (Y1, Y2, Y3).
Step S45: the 3rd initial contact coordinate that determines the 3rd touching according to the 3rd initial coordinate group, the 4th initial coordinate group and the first initial contact coordinate, the second initial contact coordinate.According to the 3rd initial coordinate group (X1, X2, X3) with the 4th initial coordinate group (Y1, Y2, Y3) combinatory possibility and acquired the first initial contact coordinate (X1, Y1), the second initial contact coordinate (X2, Y2), can determine the 3rd initial contact coordinate (X3, Y3).
Step S46: the first touching, the second touching, the 3rd that detect this acoustic wave contact panel in the period 4 are touched and the 4th touching, and calculating the first touching, the second touching, the 3rd are touched with the 4th and touched in the 5th initial coordinate group of first direction and the 6th initial coordinate group of second direction.The similar step S44 of this step when the period 4, can detect the 5th initial coordinate group, for example (X1 of the first direction (Y-axis) of 4 touchings, X2, X3, X4), with the 6th initial coordinate group of second direction (X-axis), for example (Y1, Y2, Y3, Y4).
Step S47: the 4th initial contact coordinate that determines the 4th touching according to the 5th initial coordinate group, the 6th initial coordinate group and the first initial contact coordinate, the second initial contact coordinate, the 3rd initial contact coordinate.According to the 5th initial coordinate group (X1, X2, X3, X4) and the 6th initial coordinate group (Y1, Y2, Y3, Y4) combinatory possibility and acquired the first initial contact coordinate (X1, Y1), the second initial contact coordinate (X2, Y2), the 3rd initial contact coordinate (X3, Y3), can determine the 4th initial contact coordinate (X4, Y4).
Step S48: detect the first touching, the second touching, the 3rd touching and the 4th touching that the acoustic wave contact panel continues in the period 5, calculate the first touching, the second touching, the 3rd touching and the 4th that continue and touch in first of first direction second of set of coordinates and the second direction set of coordinates that continues that continues.When the period 5, identical with the period 4, there are equally four touchings to occur, it is the first touching, the second touching, the 3rd touching and the touching that continues of the 4th touching, and the first sound wave of the first direction that is sequentially provided according to the acoustic wave contact panel and the second sound wave of second direction can obtain respectively first of first direction (for example Y-axis) set of coordinates that continues, for example (X5, X6, X7, X8), with second of second direction continue set of coordinates, for example (Y5, Y6, Y7, Y8).
Step S49: according to the first the 4th touch coordinate that continues that continues that set of coordinates, second continues that set of coordinates and the first initial contact coordinate, the second initial contact coordinate, the 3rd initial contact coordinate, the 4th initial contact coordinate determine to continue first of the first touching of continuing second of touch coordinate, the second touching continue that the 3rd of touch coordinate, the 3rd touching continue that touch coordinate and the 4th touches.That is, according to first of first direction (for example Y-axis) set of coordinates (X5 that continues, X6, X7, X8) with the second set of coordinates (Y5 that continues of second direction, Y6, Y7, Y8), with the first initial contact coordinate (X1, Y1), the second initial contact coordinate (X2, Y2), the 3rd initial contact coordinate (X3, Y3), the 4th initial contact coordinate (X4, Y4) can determine the first touching that continues, the second touching, the 3rd touching, the 4th touching correct first touch coordinate (X5 that continues, Y5), second touch coordinate (the X6 that continues, Y6), the 3rd touch coordinate (X7, Y7) that continues, the 4th touch coordinate (X8, Y8) that continues.In the touching that continues, (X1, Y1) and (X5, Y5) distance approaches, (X2, Y2) and (X6, Y6) distance approaches, (X3, Y3) and (X7, Y7) distance approaches, (X4, Y4) approaches with the distance of (X8, Y8), therefore, can determine that it is the correct touch coordinate that continues.
Step S50: according to the first initial contact coordinate, the second initial contact coordinate, the 3rd initial contact coordinate, the 4th initial contact coordinate and first touch coordinate, second touch coordinate, the 3rd touch coordinate, the 4th touch coordinate that continues that continues that continues that continues, calculate the first touching, the second touching, the 3rd touching and the 4th mobile trend of touching.Obtain correct touch coordinate, can confirm the first touching, the second touching, the 3rd touching and the translational speed of the 4th touching and the parameter of direction.
Step S51: determine a gesture according to mobile trend.For example, the different gesture of amplifying, dwindle, slide etc.
Please refer to Fig. 6, it is the 4th embodiment of acoustic wave type multi-touch detection method process flow diagram of the present invention, and it has illustrated the method for detecting that produces successively 5 touchings.
Step S61: detect first of acoustic wave contact panel in the period 1 and touch, calculate the first initial contact coordinate of the first touching.With step S41.
Step S62: detect first touching and the second touching of acoustic wave contact panel second round, calculate the first touching and touch in the first initial coordinate group of first direction and the second initial coordinate group of second direction with second.With step S42.
Step S63: the second initial contact coordinate that determines the second touching according to the first initial coordinate group, the second initial coordinate group and the first initial contact coordinate.With step S43.
Step S64: the first touching, second that detects this acoustic wave contact panel in the period 3 is touched and the 3rd touching, and calculating the first touching, the second touching and the 3rd are touched in the 3rd initial coordinate group of first direction and the 4th initial coordinate group of second direction.With step S44.
Step S65: the 3rd initial contact coordinate that determines the 3rd touching according to the 3rd initial coordinate group, the 4th initial coordinate group and the first initial contact coordinate, the second initial contact coordinate.With step S45.
Step S66: the first touching, the second touching, the 3rd that detect this acoustic wave contact panel in the period 4 are touched and the 4th touching, and calculating the first touching, the second touching, the 3rd are touched with the 4th and touched in the 5th initial coordinate group of first direction and the 6th initial coordinate group of second direction.With step S46.
Step S67: the 4th initial contact coordinate that determines the 4th touching according to the 5th initial coordinate group, the 6th initial coordinate group and the first initial contact coordinate, the second initial contact coordinate, the 3rd initial contact coordinate.With step S47.
Step S68: detect the first touching, the second touching, the 3rd touching, the 4th touching and the 5th touching of this acoustic wave contact panel in the period 5, calculate the first touching, the second touching, the 3rd touching, the 4th touching and touch in the 7th initial coordinate group of first direction and the 8th initial coordinate group of second direction with the 5th.The similar step S66 of this step when the period 5, can detect the 7th initial coordinate group of the first direction (Y-axis) of 5 touchings, for example (X1, X2, X3, X4, X5), with the 8th initial coordinate group, for example (Y1 of second direction (X-axis), Y2, Y3, Y4, Y5).
Step S69: the 5th initial contact coordinate that determines the 5th touching according to the 7th initial coordinate group, the 8th initial coordinate group and the first initial contact coordinate, the second initial contact coordinate, the 3rd initial contact coordinate, the 4th initial contact coordinate.According to the 7th initial coordinate group (X1, X2, X3, X4, X5) and the 8th initial coordinate group (Y1, Y2, Y3, Y4, Y5) combinatory possibility and acquired the first initial contact coordinate (X1, Y1), the second initial contact coordinate (X2, Y2), the 3rd initial contact coordinate (X3, Y3), the 4th initial contact coordinate, can determine the 4th initial contact coordinate (X5, Y5).
Step S70: detect the first touching, the second touching, the 3rd touching, the 4th touching and the 5th touching that the acoustic wave contact panel continues in the period 6, calculate the first touching, the second touching, the 3rd touching, the 4th touching and the 5th that continue and touch in first of first direction second of set of coordinates and the second direction set of coordinates that continues that continues.When the period 6, identical with the period 5, there are equally five touchings to occur, it is the touching that continues of the first touching, the second touching, the 3rd touching, the 4th touching and the 5th touching, the first sound wave of the first direction that is sequentially provided according to the acoustic wave contact panel and the second sound wave of second direction can obtain respectively first of first direction (for example Y-axis) continue set of coordinates, for example (X6, X7, X8, X9, X10), with second of the second direction set of coordinates that continues, for example (Y6, Y7, Y8, Y9, Y10).
Step S71: according to the first the 5th touch coordinate that continues that continues that set of coordinates, second continues that set of coordinates and the first initial contact coordinate, the second initial contact coordinate, the 3rd initial contact coordinate, the 4th initial contact coordinate, the 5th initial contact coordinate determine to continue first of the first touching of continuing second of touch coordinate, the second touching continue that the 3rd of touch coordinate, the 3rd touching continue that the 4th of touch coordinate, the 4th touching continue that touch coordinate and the 5th touches.That is, according to first of first direction (for example Y-axis) set of coordinates (X6 that continues, X7, X8, X9, X10) with second of the second direction set of coordinates (Y6 that continues, Y7, Y8, Y9, Y10), with the first initial contact coordinate (X1, Y1), the second initial contact coordinate (X2, Y2), the 3rd initial contact coordinate (X3, Y3), the 4th initial contact coordinate (X4, Y4), the 5th initial contact coordinate (X5, first touching that Y5), can determine to continue, the second touching, the 3rd touching, the 4th touching, the 5th touching correct first touch coordinate (X6, Y6) that continues, second touch coordinate (the X7 that continues, Y7), the 3rd touch coordinate (X8 that continues, Y8), the 4th touch coordinate (X9, Y9) that continues, the 5th touch coordinate (X10, Y10) that continues.In the touching that continues, (X1, Y1) and (X6, Y6) distance approaches, (X2, Y2) and (X7, Y7) distance approaches, (X3, Y3) and (X8, Y8) distance approaches, (X4, Y4) and (X9, Y9) distance approaches, (X5, Y5) and (X10, Y10) distance approaches, and therefore, can determine that it is the correct touch coordinate that continues.
Step S72: according to the first initial contact coordinate, the second initial contact coordinate, the 3rd initial contact coordinate, the 4th initial contact coordinate, the 5th initial contact coordinate and first touch coordinate, second touch coordinate, the 3rd touch coordinate, the 4th touch coordinate, the 5th touch coordinate that continues that continues that continues that continues that continues, calculate the first touching, the second touching, the 3rd touching, the 4th touching and the 5th mobile trend of touching.Obtain correct touch coordinate, can confirm the first touching, the second touching, the 3rd touching, the 4th touching and the translational speed of the 5th touching and the parameter of direction.
Step S73: determine a gesture according to mobile trend.For example, the different gesture of amplifying, dwindle, slide etc.
More than, the 3rd～6 figure has illustrated that respectively the present invention is used in the embodiment of two point～five touching.It has all used the mode of the touch points that sequentially enters to carry out the decision of touch coordinate, and uses the previous touch points coordinate of determining to come the benchmark of judging as follow-up touch points coordinate.So, use the present invention can positively reach the accurate judgement of the multi-point touch coordinate of acoustic wave contact panel.
Although technology contents of the present invention discloses as above with preferred embodiment; so it is not to limit the present invention; any technician who is familiar with technique; do not breaking away from spirit of the present invention a little change and the retouching done; all should be covered by in the category of the present invention, so the content that protection scope of the present invention ought define according to claim is as the criterion.
Claims (10)
1. an acoustic wave type multi-touch detection method applies to an acoustic wave contact panel, it is characterized in that the method includes the steps of:
Detect one first of this acoustic wave contact panel in a period 1 and touch, calculate one first initial contact coordinate of this first touching;
Detect this first touching and one second touching of this acoustic wave contact panel a second round, calculate this first touching and second touch in one first initial coordinate group of first direction and one second initial coordinate group of second direction with this; And
Determine one second initial contact coordinate of this second touching according to this first initial coordinate group, this second initial coordinate group and this first initial contact coordinate.
2. method according to claim 1 is characterized in that, more comprises following steps:
Detect this first touching and this second touching that this acoustic wave contact panel continues in a period 3, calculate this first touching of continuing and second touch in one first of this first direction one second of set of coordinates and this second direction set of coordinates that continues that continues with this; And
Determine one first of this first touching of continuing continue touch coordinate and this second one second touch coordinate that continues of touching according to this first continue set of coordinates, this second continue set of coordinates and this first initial contact coordinate, this second initial contact coordinate.
3. method according to claim 2 is characterized in that, more comprises following steps:
According to this first initial contact coordinate, this second initial contact coordinate and this first continue touch coordinate, this second touch coordinate that continues, calculate mobile trend of this first touching and this second touching; And
Determine a gesture according to this mobile trend.
4. method according to claim 1 is characterized in that, more comprises following steps:
Detect this first touching, this second touching and one the 3rd touching of this acoustic wave contact panel in a period 3, calculate this first touching, this second touching and the 3rd touch in one the 3rd initial coordinate group of this first direction and one the 4th initial coordinate group of this second direction; And
Determine one the 3rd initial contact coordinate of the 3rd touching according to the 3rd initial coordinate group, the 4th initial coordinate group and this first initial contact coordinate, this second initial contact coordinate.
5. method according to claim 4 is characterized in that, more comprises following steps:
Detect this first touching, this second touching and the 3rd touching that this acoustic wave contact panel continues in a period 4, calculate this first touching, this second touching and the 3rd of continuing and touch in one first of this first direction one second of set of coordinates and this second direction set of coordinates that continues that continues; And
According to this first set of coordinates, this second this first touching, this second touching and one first of the 3rd touching that continues set of coordinates-determine to continue with this first initial contact coordinate, this second initial contact coordinate, the 3rd initial contact coordinate touch coordinate, one second touch coordinate and the 3rd touch coordinate that continues that continues that continues that continues.
6. method according to claim 5 is characterized in that, more comprises following steps:
According to this first initial contact coordinate, this second initial contact coordinate, the 3rd initial contact coordinate and this first continue touch coordinate, this second touch coordinate, the 3rd touch coordinate that continues that continues, calculate a mobile trend of this first touching, this second touching and the 3rd touching; And
Determine a gesture according to this mobile trend.
7. method according to claim 1 is characterized in that, more comprises following steps:
Detect this first touching, this second touching and one the 3rd touching of this acoustic wave contact panel in a period 3, calculate this first touching, this second touching and the 3rd touch in one the 3rd initial coordinate group of this first direction and one the 4th initial coordinate group of this second direction;
Determine one the 3rd initial contact coordinate of the 3rd touching according to the 3rd initial coordinate group, the 4th initial coordinate group and this first initial contact coordinate, this second initial contact coordinate;
Detect this first touching, this second touching, the 3rd touching and one the 4th touching of this acoustic wave contact panel in a period 4, calculate this first touching, this second touching, the 3rd touching and the 4th touch in one the 5th initial coordinate group of this first direction and one the 6th initial coordinate group of this second direction; And
Determine one the 4th initial contact coordinate of the 4th touching according to the 5th initial coordinate group, the 6th initial coordinate group and this first initial contact coordinate, this second initial contact coordinate, the 3rd initial contact coordinate.
8. method according to claim 7 is characterized in that, more comprises following steps:
Detect this first touching, this second touching, the 3rd touching and the 4th touching that this acoustic wave contact panel continues in a period 5, calculate this first touching, this second touching, the 3rd touching and the 4th that continue and touch in one first of this first direction one second of set of coordinates and this second direction set of coordinates that continues that continues; And
According to this first set of coordinates, this second this first touching, this second touching and one first of the 3rd touching that continues set of coordinates-determine to continue with this first initial contact coordinate, this second initial contact coordinate, the 3rd initial contact coordinate and the 4th initial contact coordinate touch coordinate, one second touch coordinate, the 3rd touch coordinate and the 4th touch coordinate that continues that continues that continues that continues that continues.
9. method according to claim 1 is characterized in that, more comprises following steps:
Detect this first touching, this second touching and one the 3rd touching of this acoustic wave contact panel in a period 3, calculate this first touching, this second touching and the 3rd touch in one the 3rd initial coordinate group of this first direction and one the 4th initial coordinate group of this second direction;
Determine one the 3rd initial contact coordinate of the 3rd touching according to the 3rd initial coordinate group, the 4th initial coordinate group and this first initial contact coordinate, this second initial contact coordinate;
Detect this first touching, this second touching, the 3rd touching and one the 4th touching of this acoustic wave contact panel in a period 4, calculate this first touching, this second touching, the 3rd touching and the 4th touch in one the 5th initial coordinate group of this first direction and one the 6th initial coordinate group of this second direction;
Determine one the 4th initial contact coordinate of the 4th touching according to the 5th initial coordinate group, the 6th initial coordinate group and this first initial contact coordinate, this second initial contact coordinate, the 3rd initial contact coordinate;
Detect this first touching, this second touching, the 3rd touching, the 4th touching and one the 5th touching of this acoustic wave contact panel in a period 5, calculate this first touching, this second touching, the 3rd touching, the 4th touching and the 5th touch in one the 7th initial coordinate group of this first direction and one the 8th initial coordinate group of this second direction; And
Determine one the 5th initial contact coordinate of the 5th touching according to the 7th initial coordinate group, the 8th initial coordinate group and this first initial contact coordinate, this second initial contact coordinate, the 3rd initial contact coordinate, the 4th initial contact coordinate.
10. method according to claim 9 is characterized in that, more comprises following steps:
Detect this first touching, this second touching, the 3rd touching, the 4th touching and the 5th touching that this acoustic wave contact panel continues in a period 6, calculate this first touching, this second touching, the 3rd touching, the 4th touching and the 5th that continue and touch in one first of this first direction one second of set of coordinates and this second direction set of coordinates that continues that continues; And
According to this first set of coordinates, this second this first touching, this second touching and one first of the 3rd touching that continues set of coordinates-determine to continue with this first initial contact coordinate, this second initial contact coordinate, the 3rd initial contact coordinate, the 4th initial contact coordinate and the 5th initial contact coordinate touch coordinate, one second touch coordinate, the 3rd touch coordinate, the 4th touch coordinate and the 5th touch coordinate that continues that continues that continues that continues that continues that continues.
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| CN 201010110425 CN102141864B (en) | 2010-02-03 | 2010-02-03 | Acoustic wave type multi-touch detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008039006A1 (en) * | 2006-09-29 | 2008-04-03 | Nexio Co., Ltd. | Multi position detecting method and area detecting method in infrared rays type touch screen |
| CN101286104A (en) * | 2008-06-05 | 2008-10-15 | 成都吉锐触摸技术股份有限公司 | Method for recognizing multiple touch point at infrared touch screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008039006A1 (en) * | 2006-09-29 | 2008-04-03 | Nexio Co., Ltd. | Multi position detecting method and area detecting method in infrared rays type touch screen |
| CN101286104A (en) * | 2008-06-05 | 2008-10-15 | 成都吉锐触摸技术股份有限公司 | Method for recognizing multiple touch point at infrared touch screen |
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