CN101676847A - Coordinate detection method for touch panel - Google Patents
Coordinate detection method for touch panel Download PDFInfo
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- CN101676847A CN101676847A CN200810165636A CN200810165636A CN101676847A CN 101676847 A CN101676847 A CN 101676847A CN 200810165636 A CN200810165636 A CN 200810165636A CN 200810165636 A CN200810165636 A CN 200810165636A CN 101676847 A CN101676847 A CN 101676847A
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Abstract
The invention relates to a coordinate detection method for touch panel. The touch panel is provided with a plurality of parallel strip conductors which are arranged in an upper layer and a lower layerin a staggered way, and the strip conductors are in electric turn-off. The coordinate detection method includes the following steps: firstly a test signal is generated to poll a first equivalent strip conductor in sequence, change of voltage value and resistance value is record, the test signal polls a second equivalent strip conductor in sequence, the change of voltage value and resistance valueis record, then a processor is utilized to calculate at least one coordinate according to the obtained voltage value and resistance value, and the calculated coordinate is the position of a triggeredperson in the equivalent sensing point, thus achieving the aim of multi-touch.
Description
Technical field
The present invention relates to electric resistance touch-control panel, particularly relevant for a kind of touch control panel coordinate detection method.
Background technology
See also Figure 19, known electric resistance touch-control panel structure comprises that one is coated with ITO (Indium Tin0xides; Indium tin oxide) upper substrate 1 and of film is coated with the infrabasal plate 2 of ito thin film, when contact panel during by touch-control, upper substrate 1 and infrabasal plate 2 are in the place's of pushing conducting and can produce voltage drop, and a processor (figure does not show) then can be calculated the shared ratio of voltage drop and further be calculated coordinate axis.
Yet, above-mentioned prior art can only detect any coordinate of touch-control, if there is careless false touch to cause when multi-point touch (multi touch) situation takes place, then can cause touch point to detect mistake, extremely shown in Figure 23 as Figure 20, touch point T1 and touch point T2 are pressed simultaneously among the figure, known touch control panel coordinate detection method can only detect an equivalent resistance and can't detect the resistance value of touch point T1 and touch point T2 individually this moment, promptly obtain a coordinate that is positioned at touch point T3, but not touch point T1 and touch point T2 coordinate wherein; In other words, i.e. in the same time, touch point quantity is more than 2 o'clock, and final can detect a point coordinate; But detected this point coordinate, be not aforementioned those touch points wherein but incorrect coordinate.Whereby, the dust head can't reach the purpose of multi-point touch, forms the restriction of contact panel on operation behavior.
To sum up institute is old, and known touch control panel coordinate detection method has above-mentioned disappearance and haves much room for improvement.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of touch control panel coordinate detection method, and the place coordinate that it can detect a plurality of touch points really has the characteristic of multi-point touch (multi touch).
For reaching above-mentioned purpose, technical solution of the present invention is:
A kind of touch control panel coordinate detection method, aforementioned contact panel has one first light transmission piece and one second light transmission piece that stacks mutually, and a plurality of insulators (spacer) are between this first light transmission piece and this second light transmission piece, making wins possesses the gap between the light transmission piece and second light transmission piece, wherein, the first light transmission piece end face is provided with a plurality of first strip conductors arranged side by side, the second light transmission piece bottom surface is provided with a plurality of second strip conductors arranged side by side, and relative first strip conductor of second strip conductor is staggered setting and defines a plurality of sensing points in projected position; This coordinate detection method comprises the following step: earlier to this first strip conductor, one end ground connection, a test signal transmits first strip conductor in regular turn with polling mode, and notes down the variation of this second strip conductor output voltage values and resistance value; Then to this second strip conductor, one end ground connection, this test signal transmits second strip conductor in regular turn with polling mode, and notes down the variation of this first strip conductor output voltage values and resistance value; Thereafter utilize a processor to calculate at least one coordinate according to the variation of the magnitude of voltage of above step gained and resistance value, this coordinate is the position of the person of being triggered in this sensing points.
Whereby, touch control panel coordinate detection method of the present invention sees through above-mentioned steps, and it can overcome electric resistance touch-control panel can cause the disappearance that detects mistake at multi-point touch; In other words, the present invention can detect the place coordinate of a plurality of touch points really, and then correct coordinate is provided; It has the characteristic of multi-point touch (multi touch) compared to existing contact panel
Description of drawings
Fig. 1 is the flow chart of steps of the present invention's first preferred embodiment;
Fig. 2 is the structural representation of the present invention's first preferred embodiment, mainly discloses the structure of each assembly;
Fig. 3 mainly discloses the structure between infrabasal plate and the upper substrate for the structural representation of the present invention's first preferred embodiment;
Fig. 4 is the system configuration diagram for the present invention's first preferred embodiment;
Fig. 5 mainly discloses the situation of infrabasal plate poll to Y1 for the action synoptic diagram of the present invention's first preferred embodiment;
Fig. 6 mainly discloses the situation of infrabasal plate poll to Y2 for the action synoptic diagram of the present invention's first preferred embodiment;
Fig. 7 mainly discloses the situation of infrabasal plate poll to Y3 for the action synoptic diagram of the present invention's first preferred embodiment;
Fig. 8 mainly discloses the state of upper substrate in step e for the action synoptic diagram of the present invention's first preferred embodiment;
Fig. 9 is the action step preface figure of the test signal of the present invention's first preferred embodiment;
Figure 10 mainly discloses the situation of upper substrate poll to X1 for the action synoptic diagram of the present invention's first preferred embodiment;
Figure 11 mainly discloses the situation of upper substrate poll to X2 for the action synoptic diagram of the present invention's first preferred embodiment;
Figure 12 mainly discloses the situation of upper substrate poll to X3 for the action synoptic diagram of the present invention's first preferred embodiment;
Figure 13 mainly discloses the state of infrabasal plate in step f for the action synoptic diagram of the present invention's first preferred embodiment;
Figure 14 is the system configuration diagram for the present invention's second preferred embodiment;
Figure 15 mainly discloses the situation that the test signal forward inputs to Y2 for the action synoptic diagram of the present invention's second preferred embodiment;
Figure 16 mainly discloses the situation that test signal oppositely inputs to Y2 for the action synoptic diagram of the present invention's second preferred embodiment;
Figure 17 mainly discloses the state of upper substrate in step e for the action synoptic diagram of the present invention's second preferred embodiment;
Figure 18 is the action step preface figure of the test signal of the present invention's second preferred embodiment;
Figure 19 is the structural representation of known Touch Screen;
Figure 20 is the action synoptic diagram of known Touch Screen, mainly discloses the situation that upper substrate scans Y-axis;
Figure 21 is the action synoptic diagram of known Touch Screen, mainly discloses the situation that infrabasal plate scans Y-axis;
Figure 22 is the synoptic diagram of known Touch Screen, mainly disclose Touch Screen detect touch point Y-axis coordinate etc. the school circuit;
Figure 23 is the synoptic diagram of known Touch Screen, mainly disclose Touch Screen detect touch point Y-axis coordinate through Δ → Y conversion etc. the school circuit.
The main element symbol description
First light transmission piece, 10 first strip conductors 12
Second electrode, 17 second light transmission piece 20
Second strip conductor, 22 upper substrates 24
Sensing points P1P2 sensing points P3P4
Embodiment
In order to describe feature of the present invention and effect place in detail, lift explanation of following preferred embodiment and conjunction with figs. as back now:
See also Fig. 1 to Fig. 4, it is a kind of touch control panel coordinate detection method that is provided for the present invention's first preferred embodiment; Wherein, present embodiment is described for the benefit of, as follows to the structrual description of aforementioned contact panel:
This contact panel has one first light transmission piece 10 and one second light transmission piece 20 that stacks mutually, a plurality of insulators (spacer) 30 make and possess the gap between this first light transmission piece 10 and this second light transmission piece 20 between this first light transmission piece 10 and this second light transmission piece 20.
These first light transmission piece, 10 end faces are provided with eight first strip conductors 12 arranged side by side, and this first light transmission piece 10 constitutes an infrabasal plate 14 with this first strip conductor 12; Wherein, this first strip conductor 12 is parallel to each other and is defined as Y1 to Y8 respectively in regular turn, in order to the sweep trace as Y-axis; Respectively these first strip conductor, 12 two ends are respectively equipped with one first electrode 16 and one second electrode 17, for this first strip conductor 12 is passed to test signal or carries out ground connection.
These second light transmission piece, 20 bottom surfaces are provided with eight second strip conductors 22 arranged side by side, and this second light transmission piece 20 constitutes a upper substrate 24 with this second strip conductor 22; Wherein, this second strip conductor 22 is parallel to each other and is defined as X1 to X8 respectively in regular turn, in order to the sweep trace as X-axis; Respectively these second strip conductor, 22 two ends are respectively equipped with a third electrode 26 and one the 4th electrode 27, for this second strip conductor 22 is passed to test signal or carries out ground connection.
These second strip conductor, 22 relative these first strip conductors 12 are staggered setting and define a plurality of sensing points 28 in projected position; The bearing of trend of vertical this second strip conductor 22 of the bearing of trend of this first strip conductor 12; In the present embodiment, this sensing points 28 forms 8 * 8 the matrix that scans.Wherein, when this first strip conductor 12 one of them contact this second strip conductor 22 one of them, one of them is pressed and triggers at least promptly to represent this sensing points 28.In the present embodiment, this sensing points 28 is triggered example with sensing points P1 and sensing points P2 and describes; Wherein, sensing points P1 place coordinate is X3, Y3, and sensing points P2 place coordinate is X4, Y5.
Present embodiment provides this coordinate detection method, comprises the following step:
A) see also Fig. 4 and Fig. 5, to second electrode, 17 ground connection of this first strip conductor 12, a control device 40 is exported test signals and is transmitted in regular turn with first electrode 16 of polling mode to this first strip conductor 12; The work period of this test signal at 20 milliseconds (ms) to 50 milliseconds (ms); This test signal is selected from unidirectional and scans and back and forth scan wherein a kind of form and transmit in regular turn; In the present embodiment, this test signal is example and work period to be 50 milliseconds (ms) with the unidirectional form that scans, and only for illustrating, is not as the restriction important document at this.During scanning, present embodiment utilizes the variation of a processor 42 record magnitudes of voltage and resistance value again.
See also Fig. 5 to Fig. 8, the Y1 in this first strip conductor 12 is transfused to this test signal, and the Y1 both end voltage in this first strip conductor 12 is Vcc, and the Y2 to Y8 in this first strip conductor 12 then is off state in two ends; When this test signal poll to Y2, the Y2 both end voltage in this second strip conductor 22 is Vcc, Y1, Y3 to Y8 then two ends are off state.When this test signal poll to Y3 make Y3 and X3 electric connection because sensing points P1 is triggered, and then make the Y3 both end voltage can produce pressure drop and via the 4th electrode 27 output resistances and the magnitude of voltage of the X3 of this second strip conductor 22.In like manner, when this test signal poll to Y5, because sensing points P2 is triggered and makes Y5 and X4 electric connection, Y5 both end voltage can produce pressure drop and via the 4th electrode 27 output resistances and the magnitude of voltage of X4.Whereby, can obtain the Y-axis coordinate information of sensing points P1 and sensing points P2.
Moreover, for describing the technical characterictic of this step in detail, the relevant information of this test signal is as follows:
Tn=scans the function of time;
This first strip conductor 12 of n=single complete scan contact panel scan the order, n=1～8; Tn=tn-1+ Δ t;
Δt＝tn-tn-1＝50ms；
This first strip conductor 12 of t0=scans zero-time, in the present embodiment, and t0=0
tn＝tn-1+Δt＝t0+n*Δt；
t1＝t1-1+Δt＝t0+Δt＝Δt
t2＝t2-1+Δt＝t1+Δt＝t0+2*Δt
...
t8＝t8-1+Δt＝t7+Δt＝t0+8*Δt
Learn that via aforesaid equation in the present embodiment this first strip conductor 12 being scanned once needs 400 milliseconds (ms).
Again, the equation of this test signal is as follows:
Fn=test signal function;
f0＝0；
The magnitude of voltage of Vcc=test signal;
fn＝Vcc*Δt＝Vcc*tn-tn-1
f1＝Vcc*Δt＝Vcc*t1-t1-1＝Vcc*t1-t0
f2＝Vcc*Δt＝Vcc*t2-t2-1＝Vcc*t2-t1
...
f8＝Vcc*Δt＝Vcc*t8-t8-1＝Vcc*t8-t7
Via aforesaid equation, promptly can push away to such an extent that this test signal scans action step preface figure of this first strip conductor 12, as shown in Figure 9.
B) see also Fig. 4 and Figure 10, to the 4th electrode 27 ground connection of this second strip conductor 22, this test signal transmits in regular turn with the third electrode 26 of polling mode to this second strip conductor 22; During scanning, present embodiment utilizes the variation of these processor 42 record magnitudes of voltage and resistance value again.
See also Figure 10 to Figure 13, the X1 in this second strip conductor 22 is transfused to this test signal, and the X1 both end voltage in this second strip conductor 22 is Vcc, and the X2 to X8 in this second strip conductor 22 then is off state in two ends; When this test signal poll to X2, the X2 both end voltage in this second strip conductor 22 is Vcc, X1, X3 to X8 then two ends are off state.When this test signal poll to X3 make X3 and Y3 electric connection because sensing points P1 is triggered, and then make the X3 both end voltage can produce pressure drop and via second electrode, 17 output resistances and the magnitude of voltage of the Y3 of this first strip conductor 12.In like manner, when this test signal poll to X4, because sensing points P2 is triggered and makes X4 and Y5 electric connection, X4 both end voltage can produce pressure drop and via second electrode, 17 output resistances and the magnitude of voltage of Y5.Whereby, can obtain the X-axis coordinate information of sensing points P1 and sensing points P2; Wherein, this processor 42 is so far obtained sensing points P1 and the needed information of sensing points P2 coordinate calculated.
Moreover, for describing the technical characterictic of this step in detail, the relevant information of this test signal is as follows:
Tm=scans the function of time;
This second strip conductor 22 of m=single complete scan contact panel scan the order, m=9～16;
tm＝tm-1+Δt；
Δt＝tm-tm-1＝50ms；
This second strip conductor 22 of t8=scans zero-time, and promptly this first strip conductor 12 scans the concluding time in the present embodiment;
tm＝tm-1+Δt＝t8+n*Δt；
t9＝t9-1+Δt＝t8+Δt＝Δt
t10＝t10-1+Δt＝t9+Δt＝t8+2*Δt
...
t16＝t16-1+Δt＝t?15+Δt＝t8+8*Δt
Learn that via aforesaid equation in the present embodiment this second strip conductor 22 being scanned once needs 400 milliseconds (ms); Whereby, we can learn that contact panel finishes once complete scanning and need 800 milliseconds (ms), promptly scan the temporal summation of this first strip conductor 12 and this second strip conductor 22.Generally speaking, the time of single operation of touch-control needs 1 to 2 second at least; In other words, user's multi-point touch (multi touch) behavior can be detected by complete scanning in the running time of single touch-control.
Again, the equation of this test signal is as follows:
Fm=test signal function;
The magnitude of voltage of Vcc=test signal;
fm＝Vcc*Δt＝Vcc*tm-tm-1
f9＝Vcc*Δt＝Vcc*t9-t9-1＝Vcc*t9-t8
f10＝Vcc*Δt＝Vcc*t?10-t10-1＝Vcc*t10-t9
...
f16＝Vcc*Δt＝Vcc*t16-t16-1＝Vcc*t16-t15
Via aforesaid equation, promptly can push away to such an extent that this test signal scans action step preface figure of this second strip conductor 22, as shown in Figure 9.
C) this processor 42 is according to the variation of the magnitude of voltage of step a and step b gained and resistance value and calculate that sensing points P1 coordinate is X3, and Y3 and sensing points P2 coordinate are X4, and Y5, this coordinate are the position of the person of being triggered in this sensing points 28; Wherein, the quantity of this coordinate is corresponding to the quantity of the person of being triggered in this sensing points 28.
To sum up institute is old, and present embodiment sees through above-mentioned steps, and it can overcome electric resistance touch-control panel commonly used can cause the disappearance that detects mistake at multi-point touch; In other words, the present invention can detect the place coordinate of a plurality of touch points really in the running time of single touch-control behavior, and then correct coordinate is provided; It has the characteristic of multi-point touch compared to existing contact panel.
See also Figure 14, it is a kind of touch control panel coordinate detection method that is provided for the present invention's second preferred embodiment, and itself and first preferred embodiment are roughly the same; In the present embodiment, this sensing points 28 is triggered example with sensing points P3 and sensing points P4 and describes; Wherein, sensing points P3 place coordinate is X2, Y2, and sensing points P4 place coordinate is X4, Y2; But the difference of present embodiment is:
B) see also Figure 14 to Figure 17, described this test signal is selected from unidirectional and scans and back and forth scan wherein a kind of form and transmit in regular turn; In the present embodiment, this test signal is an example back and forth to scan form; The definition that back and forth scans form is earlier this test signal to be reached oppositely input once with the forward input respectively to single first strip conductor 12, and then obtains the Y-axis coordinate information of sensing points P3 and sensing points P4.Wherein, when this test signal poll when the Y2 of this first strip conductor 12 and this test signal are imported the Y2 forward, because sensing points P3 is triggered Y2 and X2 are electrically connected, and then make the Y2 both end voltage can produce pressure drop and, and then obtain the Y-axis coordinate information of sensing points P3 via the 4th electrode 27 output resistances and the magnitude of voltage of the X2 of this second strip conductor 22.When this test signal poll when the Y2 of this first strip conductor 12 and this test signal are oppositely imported Y2, because sensing points P4 is triggered Y2 and X4 are electrically connected, and then make the Y2 both end voltage can produce pressure drop and, and then obtain the Y-axis coordinate information of sensing points P4 via second electrode, 37 output resistances and the magnitude of voltage of the X4 of this second strip conductor 22.Whereby, even the Y coordinate axis of sensing points P3 and sensing points P4 overlaps, present embodiment still can access the Y-axis coordinate information of sensing points P3 and sensing points P4.
Moreover, for describing the technical characterictic of this step in detail, the relevant information of this test signal is as follows:
Tn=scans the function of time;
This first strip conductor 12 of n=single complete scan contact panel scan the order, n=1～8;
tn＝tn-1+2*Δt；
Δt＝[tn-tn-1]/2＝50ms；
This first strip conductor 12 of t0=scans zero-time, in the present embodiment, and t0=0;
tn＝tn-1+2*Δt＝t0+[n*2*Δt]；
t1＝t1-1+2*Δt＝t0+2*Δt＝2*Δt
t2＝t2-1+2*Δt＝t1+2*Δt＝t0+4*Δt
...
t8＝t8-1+2*Δt＝t7+2*Δt＝t0+16*Δt
Learn that via aforesaid equation in the present embodiment this first strip conductor 12 being scanned once needs 800 milliseconds (ms).Wherein, this test signal scans the action step preface figure of this first strip conductor 12, as shown in figure 18.
C) this test signal reaches oppositely input once with the forward input back and forth to scan form respectively to single second strip conductor 22 equally, and then obtains the X-axis coordinate information of sensing points P3 and sensing points P4; Wherein, this step operating principle is identical with step a, does not give unnecessary details in this appearance, and present embodiment scans this second strip conductor 22 once then needs 800 milliseconds of ms.Whereby, can obtain the X-axis coordinate information of sensing points P3 and sensing points P4; Wherein, this processor 42 is so far obtained sensing points P3 and the needed information of sensing points P4 coordinate calculated.
Via above-mentioned steps, the fundamental purpose of present embodiment is, when this sensing points 28 persons of being triggered are plural number and position during in same coordinate axis, this processor 42 still can effectively detect pressing position and correct the reckoning coordinate that should sensing points 28 persons of being triggered.
Whereby, present embodiment can reach the effect identical with first preferred embodiment equally, and guarantee that further a plurality of sensing points under the situation that coordinate axis overlaps, still can effectively detect this sensing points person's of being triggered coordinate information really, have the characteristic of reaching multi-point touch really.
Claims (5)
1. touch control panel coordinate detection method, aforementioned contact panel has one first light transmission piece and one second light transmission piece that stacks mutually, and a plurality of insulators are between this first light transmission piece and this second light transmission piece, making wins possesses the gap between the light transmission piece and second light transmission piece, wherein, the first light transmission piece end face is provided with a plurality of first strip conductors arranged side by side, the second light transmission piece bottom surface is provided with a plurality of second strip conductors arranged side by side, and relative first strip conductor of second strip conductor is staggered setting and defines a plurality of sensing points in projected position; It is characterized in that this coordinate detection method comprises the following step:
A. to this first strip conductor, one end ground connection, a test signal transmits first strip conductor in regular turn with polling mode, and notes down the variation of this second strip conductor output voltage values and resistance value;
B. to this second strip conductor, one end ground connection, this test signal transmits second strip conductor in regular turn with polling mode, and notes down the variation of this first strip conductor output voltage values and resistance value; And
C. utilize a processor according to the variation of the magnitude of voltage of step a and step b gained and resistance value and calculate at least one coordinate, this coordinate is the position of the person of being triggered in this sensing points.
2. touch control panel coordinate detection method as claimed in claim 1 is characterized in that, the work period of described this test signal of step a is at 20 milliseconds to 50 milliseconds.
3. touch control panel coordinate detection method according to claim 1 is characterized in that described this test signal of step a transmits with the simple scanning form.
4. touch control panel coordinate detection method according to claim 1 is characterized in that described this test signal of step a transmits with the shuttle-scanning form.
5. touch control panel coordinate detection method according to claim 1 is characterized in that the quantity of described this coordinate of step c is corresponding to the quantity of the person of being triggered in this sensing points.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810165636A CN101676847A (en) | 2008-09-19 | 2008-09-19 | Coordinate detection method for touch panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810165636A CN101676847A (en) | 2008-09-19 | 2008-09-19 | Coordinate detection method for touch panel |
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| Publication Number | Publication Date |
|---|---|
| CN101676847A true CN101676847A (en) | 2010-03-24 |
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ID=42029432
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| CN200810165636A Pending CN101676847A (en) | 2008-09-19 | 2008-09-19 | Coordinate detection method for touch panel |
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Open date: 20100324 |