CN1540579A - Method and system for testing coordinate in use for touching type faceplate - Google Patents

Method and system for testing coordinate in use for touching type faceplate Download PDF

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Publication number
CN1540579A
CN1540579A CNA031233260A CN03123326A CN1540579A CN 1540579 A CN1540579 A CN 1540579A CN A031233260 A CNA031233260 A CN A031233260A CN 03123326 A CN03123326 A CN 03123326A CN 1540579 A CN1540579 A CN 1540579A
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axis
output port
input
sweep trace
induced signal
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CNA031233260A
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Chinese (zh)
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CN1313911C (en
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江武崇
张清濠
郭镇坤
李培诚
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HIGHERWAY ELECTRONIC CO Ltd
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HIGHERWAY ELECTRONIC CO Ltd
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Priority to HK05102552A priority patent/HK1070164A1/en
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Abstract

Converting multiple I/O ports in X axis and multiple I/O ports in Y axis in orthogonal mode forms multiple scanning lines in X axis and multiple scanning lines in Y axis. Control signal is transferred to I/O ports in X-axis in sequence in polling mode. Based on control signal in polling mode, induced signal along X-axis caused by inductive pen of touching on touch type faceplate is stored. Largest and second largest induced signals along X-axis are calculated in order to obtain position in X-axis of the inductive pen on faceplate. Repeating above steps obtains position in Y-axis of the inductive pen on faceplate. The invention using lesser I/O ports generates needed scanning lines in X-axis and Y-axis by using invented coordinate test method. Simple method of voltage comparison is utilized in thee invention to calculate position of inductive pen.

Description

The coordinate detection method and the system that are used for touch panel
Technical field
The present invention relates to the method and system that a kind of coordinate detects, specifically, relate to the method and system that a kind of coordinate that is used for touch panel detects.
Background technology
The present existing coordinate detection method that is used for touch panel is matrix contact coordinate detection method, contactless Electric field and condenser type coordinate detection method the earliest; Be the coordinate detection method of voltage of electric field dividing potential drop in the recent period.
Matrix contact coordinate detection method directly utilizes a plurality of X-axis of input/output terminal interruption-forming and the Y-axis sweep trace of a controller, this controller is sent signal by X-axis, from the Y-axis readback signal, pressed by the user in order to detect which coordinate points, and calculate the coordinate position of this touched point again.Because this matrix contact coordinate detection method is a plurality of X-axis of input/output terminal interruption-forming and a Y-axis sweep trace of directly using this controller, therefore the number that is subject to the controller input/output port can't improve the number of X-axis and Y-axis sweep trace, thereby can't improve the resolution of the touch panel of using this kind method.
Contactless Electric field coordinate detection method then is that the output port output signal by a controller forms X-axis and Y-axis electric field coordinate plane, again by the read back induced signal of the tip of the brushstyle of a writing or painting of induction pen, through calculating the coordinate position of induction pen.In this Electric field coordinate detection method, the method of formed X-axis of the output terminal of this controller and Y-axis electric field coordinate plane has the mode of man-to-man mode and one-to-many, and so-called man-to-man mode is that an output terminal of controller forms an X-axis (or Y-axis) sweep trace; The mode of one-to-many then is that an output terminal of controller can connect into many X-axis (or Y-axis) sweep trace.The practice of this Electric field is in order to calculate the position of touch of induction pen, and the signal that its controller output port is sent is 0 and 1 signal that changes, and must counter clockwise direction and clockwise direction respectively send once, to calculate the touch-control coordinate position of correct induction pen.
Therefore, in this contactless Electric field coordinate detection method, though the number of the mode of one-to-many with the input/output port of minimizing controller arranged, but in order to calculate the touch-control coordinate position of induction pen, must be counterclockwise and clockwise direction respectively send control signal one time, compare these two voltage of signals gradient magnitude again, to obtain the touch-control coordinate position of induction pen.Yet, though theoretic obtained voltage gradient is linear, in fact not desirable linearity, so this controller needs software program to go to compensate its nonlinearized part, make the mode complexity of coordinates computed of controller increase.
The coordinate detection method of voltage of electric field dividing potential drop is a plurality of X-axis of a spot of input/output terminal interruption-forming and the Y-axis electric field coordinate plane that utilizes a controller, each bar X-axis (or Y-axis) sweep trace all is connected on the trunk lead of controller input/output terminal interruption-forming, utilizes the line resistance impedance operator on the trunk lead to form voltage dividing potential drop circuit.Therefore in theory, the X-axis of this kind method and Y-axis number of scanning lines can be subject to the limited in number of the input/output port of controller.The action that this controller all can be done once to make zero when each start is to lower the influence that resistance produces to the lead line of environment or material behavior.Similarly, this voltage of electric field dividing potential drop coordinate detection method is in order to calculate the position of touch of induction pen, its controller output port is sent 0 and 1 signal that changes, and must reach clockwise direction counterclockwise respectively send once, input/output port by induction pen and controller obtains magnitude of voltage again, to calculate correct induction pen touch-control coordinate position.
Divide in the platen press at voltage of electric field, though this controller can be with a small amount of input/output terminal interruption-forming trunk lead, form a plurality of X-axis and Y-axis sweep trace by trunk lead branch again, but utilize the resistance of lead line to form the material instability of divider resistance and the otherness of every bit electric field intensity in order to overcome, must just can obtain the coordinate position of induction pen with the computing formula of complexity, so the complexity of its software certainly will be more complicated more than the structure of above-mentioned contactless Electric field coordinate detection method.
In above-mentioned existing method, the number that forms the input/output port of the required controller of a plurality of X-axis and Y-axis sweep trace is the relation that is inverse ratio with the complexity that calculates the induction pen position of touch.That is if utilize more controller input/output port to form X-axis and Y-axis sweep trace, the formula that then calculates the induction pen coordinate position is simpler; If utilize less controller input/output port to form X-axis and Y-axis sweep trace, the formula that then calculates the induction pen coordinate position is complicated.Both are balance each other.
Therefore, be necessary to provide the coordinate detection method of a kind of innovation and rich progressive in fact, to address the above problem.
Summary of the invention
The object of the present invention is to provide a kind of coordinate detection method that is used for touch panel, may further comprise the steps: (a) with orthogonal way, change a plurality of X-axis input/output port and a plurality of Y-axis input/output port respectively, with a plurality of X-axis sweep traces and a plurality of Y-axis sweep trace that forms this touch panel; (b), transmit in regular turn and control signal to these X-axis input/output port with polling mode; (c), store X-axis induced signal accordingly via induction pen touch-control on this touch panel according to the control signal of this poll; (d) obtain the X-axis induced signal and second largest X-axis induced signal of a maximum, to calculate the X-axis position of this induction pen at this touch panel; (e), transmit in regular turn and control signal to these Y-axis input/output port with polling mode; (f), store Y-axis induced signal accordingly via this induction pen touch-control on this touch panel according to the control signal of this poll; Reach Y-axis induced signal and second largest Y-axis induced signal of (g) obtaining a maximum, to calculate the Y-axis position of this induction pen at this touch panel.
Coordinate detection method of the present invention is to utilize orthogonal way conversion X-axis or Y-axis input/output port to be X-axis or Y-axis sweep trace, therefore, can utilize less input/output port to reach required X-axis or Y-axis sweep trace, to improve resolution.Aspect calculating, the present invention utilizes simple voltage comparative approach, obtains this maximum and second largest induced signal, calculates the position of this induction pen at this touch panel with correspondence, so computing method of the present invention are very simple and rapid.
The present invention also provides a kind of coordinate detection system that is used for touch panel, comprising:
One scan line conversion equipment in order to utilize orthogonal way, is changed a plurality of X-axis input/output port and a plurality of Y-axis input/output port respectively, to form a plurality of X-axis sweep traces and a plurality of Y-axis sweep trace;
One control device in order to utilize polling mode, transmits in regular turn and controls signal to these X-axis input/output port and Y-axis input/output port, makes these X-axis sweep traces and Y-axis sweep trace have corresponding poll control signal;
One induction pen, in order to control signal according to this poll, respond to a plurality of X-axis induced signals and a plurality of Y-axis induced signal;
One database is in order to store these X-axis induced signals and the Y-axis induced signal from this induction pen; And
One calculation element is relatively obtained the X-axis induced signal, a second largest X-axis induced signal, the Y-axis induced signal and second largest Y-axis induced signal of a maximum of a maximum, to calculate X-axis and the Y-axis position of this induction pen at this touch panel.
Below in conjunction with accompanying drawing embodiments of the invention are described.
The accompanying drawing simple declaration
Fig. 1 is used for the process flow diagram of the coordinate detection method of touch panel for the present invention;
Fig. 2 is converted to the synoptic diagram of X-axis sweep trace for the X-axis input/output port of the embodiment of the invention;
Fig. 3 is the X-axis input/output port poll control signal synoptic diagram of the embodiment of the invention;
Fig. 4 is the X-axis sweep trace poll control signal synoptic diagram of the embodiment of the invention;
Fig. 5 is used for the structural representation of the coordinate detection system of touch panel for the present invention;
Fig. 6 is the structural representation of induction pen of the present invention.
Description of reference numerals
21: the sweep trace conversion equipment
50: the present invention is used for the coordinate detection system of touch panel
51: the sweep trace conversion equipment
52: control device
53: induction pen
531: antenna
532: demodulator circuit
533: circuit board
534: the isolating metal plate
535: lead
54: database
55: calculation element
The specific embodiment of the present invention
See also Fig. 1, show that wherein the present invention is used for the process flow diagram of the coordinate detection method of a touch panel.At first in step 11,, change a plurality of X-axis input/output port and a plurality of Y-axis input/output port respectively, with a plurality of X-axis sweep traces and a plurality of Y-axis sweep trace that forms this touch panel with orthogonal way.
Please cooperate with reference to figure 2, with X-axis input/output port I/O (1), I/O (2), I/O (3), I/O (4) and I/O (5) is the example explanation, one scan line conversion equipment 21 is in order to convert five X-axis input/output port I/O (1), I/O (2), I/O (3), I/O (4) and I/O (5) to 11 X-axis sweep traces (X1 to X11), wherein, I/O (1) is connected to the sweep trace of X2 and X6; I/O (2) is connected to the sweep trace of X3 and X10; I/O (3) is connected to the sweep trace of X4 and X7; I/O (4) is connected to the sweep trace of X5 and X9; And I/O (5) is connected to the sweep trace of X1, X8 and X11.
Above-mentioned conversion regime, can utilize less input/output port (for example five) to drive more sweep trace (for example 11), the sweep trace of this conversion regime is arranged must meet orthogonal (orthogonal) principle, that is the corresponding input/output port pass of adjacent scanning lines is unique, in other words, the sweep interval of adjacent scanning lines is unique relation, for example: the corresponding input/output port of X1 and X2 is I/O (5) and I/O (1), and the adjacent scanning lines that does not have other corresponds to I/O (5) and I/O (1).This technology is called " grouping input/output port " technology.
According to this grouping input/output terminal vocal imitation skill, if the number of this X-axis input/output port is N, N is an odd number, and then the maximum number of this X-axis sweep trace is C (N, 2)+1, and the maximum number of sweep interval is C (N, 2); If N is an even number, then the maximum number of this X-axis sweep trace is C (N, 2)-N/2+2, and the maximum number of sweep interval is C (N, 2)-N/2+1.For example: if N=5, then the maximum number of sweep trace is C (5,2)+1=11, as shown in Figure 2.If N=6, then the maximum number of sweep trace is C (6,2)-6/2+2=14.
In step 12, in poll (polling) mode, transmit in regular turn and control signal to these X-axis input/output port, make these X-axis sweep traces have corresponding poll control signal.Please refer to Fig. 3 and Fig. 4, transmit in order a square wave control signal by I/O (1) to I/O (5), then these X-axis sweep traces have corresponding poll square wave control signal, that is, be connected to the sweep trace of X2 and X6 because of I/O (1), if I/O (1) receive the poll control signal, then X2 and X6 sweep trace have the poll control signal simultaneously.
In step 13,, store X-axis induced signal accordingly via induction pen touch-control on this touch panel according to the control signal of this poll.That is, when each input/output port is sent out the poll control signal, this induction pen promptly respond to an X-axis induced signal.Therefore, have five input/output port in the foregoing description, and transmit the poll control signal in regular turn, thus this induction pen poll control signal in regular turn, respond to five X-axis induced signals.
In step 14, relatively obtain the X-axis induced signal and second largest X-axis induced signal of a maximum, to calculate the X-axis position of this induction pen at this touch panel.
With an embodiment explanation, if this induction pen clicks contact to the X8 sweep trace of this touch panel and the position between the X9 sweep trace, and when being partial to the X9 sweep trace, then can be when having polling signal at X-axis input/output port I/O (4), this induction pen can respond to the X-axis induced signal of a maximum; And at X-axis input/output port I/O (5) when having polling signal, this induction pen can respond to a second largest X-axis induced signal.
This is that the X9 sweep trace is driven by X-axis input/output port I/O (5) because the X8 sweep trace is driven by X-axis input/output port I/O (4).Corresponding relation according to this X-axis sweep trace and X-axis input/output port, and according to the poll control signal, the X-axis induced signal of the maximum that this induction pen is responded to and second largest X-axis induced signal, can calculating this induction pen, to click position contacting be between X8 sweep trace and X9 sweep trace, and be partial to the position of X9 sweep trace.
Therefore, according to above-mentioned method, can be simply and promptly calculate this induction pen this touch panel click the X-axis position, and also can utilize less X-axis input/output port to reach required X-axis sweep trace, to improve resolution.
Similarly, this induction pen is identical in the computing method that click the X-axis position of this touch panel with calculating, calculate this induction pen again and click the Y-axis position at this touch panel, shown in step 15, with polling mode, transmit in regular turn and control signal to these Y-axis input/output port, make these Y-axis sweep traces have corresponding poll control signal.Shown in step 16,, store Y-axis induced signal accordingly via this induction pen touch-control on this touch panel according to the control signal of this poll.Shown in step 17, obtain the Y-axis induced signal and second largest Y-axis induced signal of a maximum, to calculate the Y-axis position of this induction pen at this touch panel.According to above-mentioned computing method, can calculate this induction pen simply and click the Y-axis position at this touch panel.
Via above-mentioned calculating, can obtain this induction pen this touch panel click X-axis and Y-axis position, can learn the certain coordinate position of this induction pen at this touch panel.
Therefore, coordinate detection method of the present invention is to utilize orthogonal way conversion X-axis or Y-axis input/output port to be X-axis or Y-axis sweep trace, so can utilize less input/output port to reach required X-axis or Y-axis sweep trace, to improve the resolution of this touch panel.Aspect calculating, the present invention utilizes simple voltage comparative approach, obtains this maximum and second largest induced signal, calculates the position of this induction pen at this touch panel with correspondence, so computing method of the present invention are very simple and rapid.Coordinate detection method of the present invention has the advantage that improves resolution with less controller input/output port concurrently, and the advantage of simple computation coordinate position.
With reference to figure 5, show that wherein the present invention is used for the coordinate detection system 50 of a touch panel, it comprises: one scan line conversion equipment 51, a control device 52, an induction pen 53, a database 54 and a calculation element 55.This sweep trace conversion equipment 51 is in order to utilize orthogonal way, change a plurality of X-axis input/output port and a plurality of Y-axis input/output port respectively, to form a plurality of X-axis sweep traces (X1 to Xn) and a plurality of Y-axis sweep traces (Y1 to Ym), can cooperate with reference to figure 2, it shows that five X-axis input/output port I/O (1) convert 11 X-axis sweep traces (X1 to X11) to I/O (5).These X-axis and Y-axis sweep trace form the coordinate of this touch panel.
This control device 52 is to utilize polling mode, transmits in regular turn and controls signal to these X-axis input/output port and Y-axis input/output port, makes these X-axis sweep traces and Y-axis sweep trace have corresponding poll control signal.Please refer to Fig. 3 and Fig. 4, its explanation transmit in order a square wave control signal by I/O (1) to I/O (5), then these X-axis sweep traces have corresponding poll square wave control signal.
This induction pen 53 is in order to the control signal according to this poll, respond to a plurality of X-axis induced signals and a plurality of Y-axis induced signal.With reference to figure 6, this induction pen 53 has an antenna 531, a demodulator circuit 532, a circuit board 533, an isolating metal shell 534 and a lead 535.This antenna 531 utilizes Copper Foil lead on this circuit board 533 as antenna, to respond to the electric field signal of this touch panel.This antenna 531 is in order to according to this poll control signal, respond to a plurality of X-axis induced signals and a plurality of Y-axis induced signal, and be sent to this demodulator circuit 532.This demodulator circuit 532 is in order to these X-axis induced signals of demodulation and Y-axis induced signal, and is sent to this database 54 with lead 535 and stores.Isolating metal shell 535 is in order to be covered in this demodulator circuit 532, with the isolating exterior noise.This isolating metal shell 535 is preferably dome-type, grips in order to the user.
This database 54 is in order to store these X-axis induced signals and the Y-axis induced signal from this induction pen 53.Have five input/output port according to embodiment shown in Figure 3, and transmit the poll control signal in regular turn, thus this induction pen poll control signal in regular turn, respond to five X-axis induced signals, and be stored in this database 54.
This calculation element 55 is relatively calculated by X-axis induced signal stored in this database 54 and Y-axis induced signal, with the X-axis induced signal of obtaining a maximum, a second largest X-axis induced signal, the Y-axis induced signal and second largest Y-axis induced signal of a maximum.Again according to the relation of input/output port and X-axis or Y-axis sweep trace, to calculate X-axis and the Y-axis position of this induction pen at this touch panel.
Yet the foregoing description only is explanation principle of the present invention and effect thereof, and unrestricted the present invention.Therefore, those skilled in the art can make amendment and change without prejudice to spirit of the present invention the foregoing description.Interest field of the present invention claims as described later is listed.

Claims (8)

1. coordinate detection method that is used for touch panel may further comprise the steps:
(a), change a plurality of X-axis input/output port and a plurality of Y-axis input/output port respectively, with a plurality of X-axis sweep traces and a plurality of Y-axis sweep trace that forms this touch panel with orthogonal way;
(b) with polling mode, transmit in regular turn and control signal to these X-axis input/output port, make these X-axis sweep traces have corresponding poll control signal;
(c), store X-axis induced signal accordingly via induction pen touch-control on this touch panel according to the control signal of this poll;
(d) obtain the X-axis induced signal and second largest X-axis induced signal of a maximum, to calculate the X-axis position of this induction pen at this touch panel;
(e) with polling mode, transmit in regular turn and control signal to these Y-axis input/output port, make these Y-axis sweep traces have corresponding poll control signal;
(f), store Y-axis induced signal accordingly via this induction pen touch-control on this touch panel according to the control signal of this poll; And
(g) obtain the Y-axis induced signal and second largest Y-axis induced signal of a maximum, to calculate the Y-axis position of this induction pen at this touch panel.
2. according to the process of claim 1 wherein that the number of this X-axis input/output port in the step (a) or Y-axis input/output port is N, wherein N is an odd number, and then the maximum number of this X-axis sweep trace or this Y-axis sweep trace is C (N, 2)+1.
3. according to the process of claim 1 wherein that the number of this X-axis input/output port in the step (a) or Y-axis input/output port is N, wherein N is an even number, and then the maximum number of this X-axis sweep trace or this Y-axis sweep trace is C (N, 2)-N/2+2.
4. coordinate detection system that is used for touch panel comprises:
One scan line conversion equipment in order to utilize orthogonal way, is changed a plurality of X-axis input/output port and a plurality of Y-axis input/output port respectively, to form a plurality of X-axis sweep traces and a plurality of Y-axis sweep trace;
One control device in order to utilize polling mode, transmits in regular turn and controls signal to these X-axis input/output port and Y-axis input/output port, makes these X-axis sweep traces and Y-axis sweep trace have corresponding poll control signal;
One induction pen, in order to control signal according to this poll, respond to a plurality of X-axis induced signals and a plurality of Y-axis induced signal;
One database is in order to store these X-axis induced signals and the Y-axis induced signal from this induction pen; And
One calculation element is relatively obtained the X-axis induced signal, a second largest X-axis induced signal, the Y-axis induced signal and second largest Y-axis induced signal of a maximum of a maximum, to calculate X-axis and the Y-axis position of this induction pen at this touch panel.
5. according to the system of claim 4, wherein the number of this X-axis input/output port or Y-axis input/output port is N, and N is an odd number, and then the maximum number of this X-axis sweep trace or this Y-axis sweep trace is C (N, 2)+1.
6. according to the system of claim 4, wherein the number of this X-axis input/output port or Y-axis input/output port is N, and N is an even number, and then the maximum number of this X-axis sweep trace or this Y-axis sweep trace is C (N, 2)-N/2+2.
7. according to the system of claim 4, wherein this induction pen has an antenna and a demodulator circuit, and this antenna is in order to according to this poll control signal, respond to a plurality of X-axis induced signals and a plurality of Y-axis induced signal; This demodulator circuit is in order to these X-axis induced signals of demodulation and Y-axis induced signal, and is sent to this database storage.
8. according to the system of claim 7, wherein this induction pen also comprises an isolating metal shell, in order to be covered in this demodulator circuit, with the isolating exterior noise.
CNB031233260A 2003-04-24 2003-04-24 Method and system for testing coordinate in use for touching type faceplate Expired - Fee Related CN1313911C (en)

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HK05102552A HK1070164A1 (en) 2003-04-24 2005-03-24 Coordinate detecting method and system for touch panel

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CN100416480C (en) * 2004-03-29 2008-09-03 东芝松下显示技术有限公司 Input sensor containing display device and method for driving the same
CN101561726B (en) * 2009-05-19 2011-05-11 华映光电股份有限公司 Coordinate positioning method
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CN101458590B (en) * 2007-12-10 2013-01-23 三星显示有限公司 Touch sensing display device and driving method thereof
CN102109937B (en) * 2009-12-24 2013-06-26 联阳半导体股份有限公司 Locating device and locating method for touch device
CN103853368A (en) * 2012-12-03 2014-06-11 国基电子(上海)有限公司 Touch screen electronic device and control method thereof
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CN100416480C (en) * 2004-03-29 2008-09-03 东芝松下显示技术有限公司 Input sensor containing display device and method for driving the same
CN101458590B (en) * 2007-12-10 2013-01-23 三星显示有限公司 Touch sensing display device and driving method thereof
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CN102270079A (en) * 2011-08-01 2011-12-07 深圳Tcl新技术有限公司 Thin film transistor (TFT)-display-screen-based handwriting device, method and TFT display screen
CN103853368A (en) * 2012-12-03 2014-06-11 国基电子(上海)有限公司 Touch screen electronic device and control method thereof
CN104731434A (en) * 2015-03-27 2015-06-24 惠州Tcl移动通信有限公司 Touch screen interference prevention method and system and mobile terminal
CN110908006A (en) * 2018-09-14 2020-03-24 欧姆龙株式会社 Object detection sensor and object detection system

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