CN102375594B - Touch input device and scanning method thereof - Google Patents
Touch input device and scanning method thereof Download PDFInfo
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- CN102375594B CN102375594B CN201010264390.5A CN201010264390A CN102375594B CN 102375594 B CN102375594 B CN 102375594B CN 201010264390 A CN201010264390 A CN 201010264390A CN 102375594 B CN102375594 B CN 102375594B
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Abstract
The invention relates to a scanning method applicable to a touch panel. The touch panel comprises a plurality of sensing lines in an X direction and a plurality of sensing lines in a Y direction, wherein the sensing lines in the X direction and the sensing lines in the Y direction are arranged in a crossed manner, and a plurality of mutual capacitors are formed between the sensing lines in the X direction and the sensing lines in the Y direction. According to an embodiment of the invention, the scanning method comprises the following steps: firstly determining the number of the sensing lines to be measured so as to determine a measurement channel; applying drive signals to the other sensing lines except the measurement channel during the scanning process; and detecting two types of voltage positioned on the measurement channel so as to obtain the touch position on the touch panel.
Description
Technical field
The present invention relates to a kind of scan method that is applicable to contact panel.
Background technology
Contact panel had been widely used on the fields such as electrical home appliances, communication device and electronics information device at present already.Contact panel is applied to the input interfaces such as personal digital assistant (PDA), electronic product and game machine conventionally.The Integrated Trend of contact panel and display screen can allow user to choose with finger or contact pen the representative image (icon) showing on panel now, so can make personal digital assistant, electronic product and game machine carry out the function of hobby.This kind of contact panel also can be applicable to public information inquiry system, so that the public can more efficient operating system.
For effectively detecting user with the tram of finger or contact pen institute contact surface plate, contact panel has now developed multiple technologies.For example, contact panel can be designed as a capacitance type touch-control panel, and its positioning principle is to utilize the variation of the electric capacity be embedded in the induction grid in contact panel to judge the position of contact point.Except above-mentioned capacitance type touch-control panel, according to different principle of induction, contact panel separately comprises electric resistance touch-control panel, optical touch control panel and acoustic wave contact panel.
Fig. 1 shows the schematic diagram of the contact panel 10 of a prior art.This contact panel 10 comprises many directions X sense wire X1-Xm and many Y-direction sense wire Y1-Yn, and wherein m is the positive integer that phase XOR is identical with n.Described directions X sense wire X1-Xm and Y-direction sense wire Y1-Yn are embedded in the different layers in this contact panel 10.With reference to figure 1, described directions X sense wire X1-Xm and Y-direction sense wire Y1-Yn are and are staggered, in order to form an induction grid.In this induction grid, a plurality of mutual electric capacity (mutual capacitor) (not drawing) is formed between each directions X sense wire and each Y-direction sense wire.
Fig. 2 shows the schematic diagram of the touch-control input device 20 of a prior art.This touch-control input device 20 comprises aforementioned contact panel 10, a directions X drives channel selecting module 22, a Y-direction to drive channel selecting module 24 and a touch control sensing circuit 26.With reference to Fig. 2, this touch control sensing circuit 26 comprises a selection module 262 and a differential detection module 264, and wherein this selection module 262 further comprises one first MUX 2622, one second MUX 2624 and in order to control a control circuit 2626 of above-mentioned MUX.
In when work, this first MUX 2622 select described directions X sense wire X1-Xm wherein one to several sense wires or described Y-direction sense wire Y1-Yn wherein one to several sense wires, to choose one first induced voltage.Simultaneously, this second MUX 2624 select described directions X sense wire X1-Xm one to several not by this first MUX 4222 optants or described Y-direction sense wire Y1-Yn one to several not by this first MUX 4222 optants, to choose one second induced voltage.This first and second induced voltage produces by mutual capacitive sensing one excitation signal respectively.This first and second induced voltage inputs to this differential detection module 264.Because described inductive voltage value can change with the touching of mutual electric capacity with user, therefore by detecting the difference of described induced voltage, can learn user's position of touch.
Contact panel 10 in Fig. 1 is positions that the mode that scans each sense wire by order (sequential) is carried out sensing user touching.Yet in the scan mode of prior art, the initial value of the first and second induced voltages can change with the state of corresponding sense wire in last scan order, causes the drift of the first and second induced voltage steady-state values.
Therefore, be necessary to propose a kind of scan method that is applicable to contact panel to address the above problem.
Summary of the invention
One of object of the present invention is to provide a kind of scan method that is applicable to contact panel, and this scan method has solved the initial value due to the first and second induced voltages in the scan mode of prior art and with the state of corresponding sense wire in last scan order, changed the problem of the first and second induced voltage steady-state value drifts that cause.
For achieving the above object, contact panel scan method of the present invention has adopted following technical scheme.
A kind of scan method, be applied in a contact panel, described contact panel comprises many directions X sense wires and many Y-direction sense wires, described directions X sense wire and described Y-direction sense wire are for being crisscross arranged, and a plurality of mutual electric capacity is formed between each directions X sense wire and each Y-direction sense wire, and described scan method comprises following steps: the sense wire number of selecting wish to measure; According to described sense wire number, select many first sense wires in described directions X sense wire as measuring passage; When scanning for the first time, output one drives signal to described the first sense wire other sense wires in addition; When scanning for the first time, detect and be positioned at two the first voltages on this measurement passage; When scanning for the second time, export described driving signal to described the first sense wire; And when scanning for the second time, the sense wire number measuring according to described wish detects and is positioned at two second voltages on the measurement passage after displacement, in order to sensing position of touch.
Preferably, the arrangement mode that is set as measuring described many sense wires of passage in scan method of the present invention is adjacent one another are.
Preferably, the arrangement mode of described many sense wires that is set as measuring passage in scan method of the present invention is for being spaced.
Preferably, scan method of the present invention further comprises the step that decides user's touch position according to described the first voltage and described second voltage.
Preferably, in scan method of the present invention, described contact panel is according to following equation, to determine the minimum value of described directions X sense wire number or described Y-direction sense wire number: Num=4 * N
sET-2, wherein, Num represents the minimum value of described directions X sense wire number or described Y-direction sense wire number, and N
sETrepresent the sense wire number that described wish measures.
As can be seen here, the present invention has disclosed a kind of scan method that is applicable to contact panel.This contact panel comprises many directions X sense wires and many Y-direction sense wires.Described directions X sense wire and described Y-direction sense wire are and are crisscross arranged, and a plurality of mutual electric capacity is formed between each directions X sense wire and each Y-direction sense wire.The method includes the steps of: the sense wire number of selecting wish to measure; According to this sense wire number, select many first sense wires in described directions X sense wire as a measurement passage; When scanning for the first time, output one drives signal to described the first sense wire other sense wires in addition; When scanning for the first time, detect and be positioned at two the first voltages on this measurement passage; When scanning for the second time, export this driving signal to described the first sense wire; And when scanning for the second time, the sense wire number measuring according to this wish detects and is positioned at two second voltages on the measurement passage after displacement.
For achieving the above object, contact panel scan method of the present invention also can adopt another kind of technical scheme.
A kind of scan method, be applied in a contact panel, described contact panel comprises many directions X sense wires and many Y-direction sense wires, described directions X sense wire and described Y-direction sense wire are for being crisscross arranged, and a plurality of mutual electric capacity is formed between each directions X sense wire and each Y-direction sense wire, and described scan method comprises following steps: the sense wire number of selecting wish to measure; According to described sense wire number, select many first sense wires in described directions X sense wire as a measurement passage; When scanning for the first time, output one drives signal to other sense wires on directions X sense wire described in described Y-direction sense wire suspension joint; When scanning for the first time, detect and be positioned at two the first voltages on described measurement passage; When scanning for the second time, the first sense wire described in suspension joint; And when scanning for the second time, the sense wire number measuring according to this wish detects and is positioned at two second voltages on the measurement passage after displacement, in order to sensing position of touch.
Preferably, the arrangement mode that is set as measuring described many sense wires of passage in scan method of the present invention is adjacent one another are.
Preferably, the arrangement mode of described many sense wires that is set as measuring passage in scan method of the present invention is for being spaced.
Preferably, scan method of the present invention further comprises the step that decides user's touch position according to described the first voltage and described second voltage.
Preferably, contact panel described in scan method of the present invention is according to following equation, to determine the minimum value of described directions X sense wire number or described Y-direction sense wire number: Num=4 * N
sET-2, wherein, Num represents the minimum value of described directions X sense wire number or described Y-direction sense wire number, and N
sETrepresent the sense wire number that described wish measures.
As can be seen here, the present invention has disclosed the another kind of scan method that is applicable to contact panel.This contact panel comprises many directions X sense wires and many Y-direction sense wires.Described directions X sense wire and described Y-direction sense wire are and are crisscross arranged, and a plurality of mutual electric capacity is formed between each directions X sense wire and each Y-direction sense wire.The method includes the steps of: the sense wire number of selecting wish to measure; According to this sense wire number, select many first sense wires in described directions X sense wire as a measurement passage; When scanning for the first time, output one drives signal to other sense wires on directions X sense wire described in described Y-direction sense wire suspension joint; When scanning for the first time, detect and be positioned at two the first voltages on this measurement passage; When scanning for the second time, the first sense wire described in suspension joint; And when scanning for the second time, the sense wire number measuring according to this wish detects and is positioned at two second voltages on the measurement passage after displacement.
Another object of the present invention is to provide a kind of new touch-control input device, with the touch-control input device that solves prior art because the initial value of the first and second induced voltages changes the problem of the first and second induced voltage steady-state value drifts that cause with the state of corresponding sense wire in last scan order.
For achieving the above object, touch-control input device of the present invention has adopted following technical scheme.
A touch-control input device, comprises: a contact panel, comprises: many directions X sense wires; Many Y-direction sense wires, wherein said directions X sense wire and described Y-direction sense wire are for being crisscross arranged; And a plurality of mutual electric capacity, be formed at described in each directions X sense wire and described in each between Y-direction sense wire; And a panel drive circuit, in order to drive described contact panel, described panel drive circuit comprises: one selects circuit, for the sense wire number measuring according to wish, selects and displacement one measures passage; One drive signal generation circuit, for selecting the output signal output one of circuit to drive signal to described measurement passage other sense wires in addition according to this; And a testing circuit, for detection of two voltages that are positioned on described measurement passage.
Preferably, in touch-control input device of the present invention, the arrangement mode of described many sense wires in described measurement passage is adjacent one another are.
Preferably, in touch-control input device of the present invention, the arrangement mode of described many sense wires in described measurement passage is for being spaced.
Preferably, touch-control input device of the present invention further comprises a decision circuitry, judges user's touch position for described two voltages that detect according to described testing circuit.
As can be seen here, the present invention has disclosed a kind of touch-control input device.This touch-control input device comprises a contact panel and in order to drive a panel drive circuit of this contact panel.This contact panel comprises many directions X sense wires and many Y-direction sense wires.Described directions X sense wire and described Y-direction sense wire are and are crisscross arranged, and a plurality of mutual electric capacity is formed between each directions X sense wire and each Y-direction sense wire.This panel drive circuit comprises a selection circuit, a drive signal generation circuit and a testing circuit.This selects the sense wire number that circuit measures according to wish to select and displacement one measurement passage.This drive signal generation circuit selects the output signal output one of circuit to drive signal to measure passage other sense wires in addition to this according to this.This testing circuit detects and is positioned at two voltages on this measurement passage.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the contact panel of a prior art;
Fig. 2 is the schematic diagram of the touch-control input device of a prior art;
Fig. 3 is the block schematic diagram of the touch-control input device of one embodiment of the invention;
Fig. 4 is the process flow diagram of the scan method of one embodiment of the invention;
Fig. 5 is the one scan order embodiment according to the scan method of Fig. 4;
Fig. 6 is the process flow diagram of the scan method of another embodiment of the present invention;
Fig. 7 is the one scan order embodiment according to the scan method of Fig. 6;
Fig. 8 is another scanning sequency embodiment according to the scan method of Fig. 4;
Fig. 9 is another scanning sequency embodiment according to the scan method of Fig. 6;
Figure 10 is the order of the one scan again embodiment according to the scan method of Fig. 4; And
Figure 11 is the another scanning sequency embodiment according to the scan method of Fig. 4.
Embodiment
Below in conjunction with specific embodiment and shown in accompanying drawing, the present invention is described in further detail.Yet, it is pointed out that execution of the present invention is not limited to the familiar specific details of various equivalent modifications.On the other hand, well-known structure or step are not described in details, with the restriction of avoiding causing the present invention unnecessary.Below only describe preferred embodiment of the present invention in detail, however scope of the present invention be not limited to the examples, except these embodiment, the present invention can also be widely used in other embodiment.
For convenient explaination scan method of the present invention, below the touch-control input device of carrying out scan method of the present invention will first be described.Fig. 3 shows the block schematic diagram of the touch-control input device 30 of one embodiment of the invention.This touch-control input device 30 comprises a contact panel 32, a clock generating circuit 34, a drive signal generation circuit 36, a directions X sense wire selection module 38, Y-direction sense wire selection module 40 and a touch control sensing circuit 42.With reference to Fig. 3, this touch control sensing circuit 42 comprises a selection module 422 and a differential detection module 424, and wherein this selection module 422 further comprises one first MUX 4222, one second MUX 4224 and in order to control a control circuit 4226 of above-mentioned MUX.
In the present embodiment, this contact panel 32 comprises many directions X sense wire X1-X10 and many Y-direction sense wire Y1-Y10.Described directions X sense wire X1-X10 and described Y-direction sense wire Y1-Y10 are embedded in the different layers in this contact panel 32.With reference to figure 3, described directions X sense wire X1-X10 and described Y-direction sense wire Y1-Y10, for being staggered, in order to form, but are not limited to a well word shape grid.In this well word shape grid, a plurality of mutual electric capacity (not drawing) are formed between each directions X sense wire and each Y-direction sense wire.
This clock generating circuit 34 produces a clock signal clk to this drive signal generation circuit 36.This drive signal generation circuit 36 produces one according to this clock signal clk and drives signals DP to described directions X sense wire X1-X10 and described Y-direction sense wire Y1-Y10.This driving signals DP can for but be not limited to, a square wave driving signal, a triangular wave drive signal or a string ripple to drive signal.
This first MUX 4222 in order to select described directions X sense wire X1-X10 wherein one to several sense wires or described Y-direction sense wire Y1-Y10 wherein one to several sense wires, to choose one first induced voltage.This second MUX 4224 in order to select described directions X sense wire X1-X10 one to several not by this first MUX 4222 optants or described Y-direction sense wire Y1-Y10 one to several not by this first MUX 4222 optants, to choose one second induced voltage.This first and second induced voltage inputs to this differential detection module 424.When a point of crossing of described directions X sense wire X1-X10 and described Y-direction sense wire Y1-Y10 is when touched, by the variation of Inductance and Capacitance value, described inductive voltage value will change.See through the Output rusults of this differential detection module 424, can learn the position that user touches.
Fig. 4 is the process flow diagram of the scan method of one embodiment of the invention, and this scan method is applied to above-mentioned touch-control input device.The method includes the steps of: the sense wire number (step S40) of selecting wish to measure; According to this sense wire number, select many first sense wires in described directions X sense wire as a measurement passage (step S42); When scanning for the first time, output one drives signal to described the first sense wire other sense wires (step S44) in addition; When scanning for the first time, detect and be positioned at two the first voltages (step S46) on this measurement passage; When scanning for the second time, export this driving signal to described the first sense wire (step S48); And when scanning for the second time, the sense wire number measuring according to this wish detects and is positioned at two second voltages (step S50) on the measurement passage after displacement.Below coordinate the device of Fig. 3 and the scanning sequency of Fig. 5 to describe the details of scan method of the present invention.
In step S40, the sense wire number of first selecting wish to measure.This sense wire number is to be more than or equal to 2 integer.Fig. 5 is the one scan order embodiment according to the scan method of Fig. 4.In this embodiment the sense wire number that measures of wish be set as 2, and the sense wire X1 in described directions X sense wire and X2 are set to initial measurement passage.With reference to Fig. 5, when scanning for the first time, one drives signals DP to export sense wire X1 and X2 other sense wires in addition to.When scanning for the first time, the voltage being positioned on this sense wire X1 can choose to be sent to by this first MUX 4222 a first input end R of this differential detection module 424.Meanwhile, the voltage being positioned on this sense wire X2 can choose to be sent to by this second MUX 4,224 one second input end S of this differential detection module 424.This differential detection module 424 can detect the difference by this first and second MUX 4222 and 4224 selected two magnitudes of voltage, in order to produce a touch sense signals sout.
Then,, when scanning for the second time, the displacement to the right of initial measurement passage forms new measurement passage, that is sense wire X3 and X4.Therefore, this this driving signals DP of drive signal generation circuit 36 outputs other sense wires to sense wire X3 and X4.When scanning for the second time, the voltage being positioned on this sense wire X3 can choose to be sent to by this first MUX 4222 this first input end R of this differential detection module 424.Meanwhile, the voltage being positioned on this sense wire X4 can choose to be sent to by this second MUX 4226 this second input end S of this differential detection module 424.This differential detection module 424 produces this touch sense signals sout according to the magnitude of voltage of two input ends.
Similarly, in other scanning sequencies, measure sequentially displacement to the right of passage.The sense wire measuring outside passage is transfused to this driving signals DP.By the coupling effect of mutual electric capacity, this driving signals DP can be coupled to the node measuring on passage.If user touches these nodes, the capacitance of mutual electric capacity will change and causes the change of voltage.By detecting the variation of described voltage, can learn the position that this contact panel 32 is touched.In the present embodiment, the previous state of each measurement passage of setting is driving condition, therefore while scanning, the starting potential value that measures the node of passage can be identical at every turn, and the variation of the capacitance that its steady state voltage value can the mutual electric capacity of actual response.
Fig. 6 is the process flow diagram of the scan method of another embodiment of the present invention, and this scan method is applied to above-mentioned touch-control input device.The method includes the steps of: the sense wire number (step S60) of selecting wish to measure; According to this sense wire number, select many first sense wires in described directions X sense wire as measuring passage (step S62); When scanning for the first time, output one drives signal to other sense wires (step S64) on described Y-direction sense wire the described directions X sense wire of suspension joint (float); When scanning for the first time, detect and be positioned at two the first voltages (step S66) on this measurement passage; When scanning for the second time, the first sense wire (step S68) described in suspension joint; And when scanning for the second time, the sense wire number measuring according to this wish detects and is positioned at two second voltages (step S70) on the measurement passage after displacement." suspension joint " term refers to not apply any voltage to corresponding sense wire herein.That is this sense wire is a high impedance status.Below coordinate the device of Fig. 3 and the scanning sequency of Fig. 7 to describe the details of scan method of the present invention.
In step S60, the sense wire number of first selecting wish to measure.This sense wire number is to be more than or equal to 2 integer.Fig. 7 is the one scan order embodiment according to the scan method of Fig. 6.In this embodiment the sense wire number that measures of wish be set as 2, and the sense wire X1 in described directions X sense wire and X2 are set to initial measurement passage.With reference to Fig. 7, when scanning for the first time, one drives signals DP to export other sense wires on directions X sense wire described in described Y-direction sense wire Y1-Y10 and suspension joint to.When scanning for the first time, the voltage being positioned on this sense wire X1 can choose to be sent to by this first MUX 4222 a first input end R of this differential detection module 424.Meanwhile, the voltage being positioned on this sense wire X2 can choose to be sent to by this second MUX 4,224 one second input end S of this differential detection module 424.This differential detection module 424 can detect the difference by this first and second MUX 4222 and 4224 selected two magnitudes of voltage, in order to produce a touch sense signals sout.
Then,, when scanning for the second time, the displacement to the right of initial measurement passage forms new measurement passage, that is sense wire X3 and X4.Therefore, these drive signal generation circuit 36 outputs this drive signals DP to described Y-direction sense wire Y1-Y10, and other sense wires outside sense wire X3 and X4 are floating.When scanning for the second time, the voltage being positioned on this sense wire X3 can choose to be sent to by this first MUX 4222 this first input end R of this differential detection module 424.Meanwhile, the voltage being positioned on this sense wire X4 can choose to be sent to by this second MUX 4224 this second input end S of this differential detection module 424.This differential detection module 424 produces this touch sense signals sout according to the magnitude of voltage of two input ends.
Similarly, in other scanning sequencies, measure sequentially displacement to the right of passage.The outer sense wire that measures passage is transfused to this driving signals DP or keeps a floating.By the coupling effect of mutual electric capacity, this driving signal can be coupled to the node measuring on passage.If user touches these nodes, the capacitance of mutual electric capacity will change and causes the change of voltage.By detecting the variation of described voltage, can learn the position that this contact panel 32 is touched.In the present embodiment, the previous state of each measurement passage of setting is floating, therefore while scanning, the starting potential value that measures the node of passage can be identical at every turn, and the variation of the capacitance that its steady state voltage value can the mutual electric capacity of actual response.
With reference to Fig. 5 and Fig. 7, its arrangement mode of many sense wires that is set as initial measurement passage is adjacent one another are.Yet according to another embodiment of the present invention, its arrangement mode of many sense wires that is set as initial measurement passage can be and is spaced, as shown in Figure 8 and Figure 9.With reference to Fig. 8, sense wire X2 is being set as between the sense wire X1 and X3 of initial measurement passage.When driving panel to scan for the first time, sense wire X2 and X4 are driving condition.Then,, when driving panel to scan for the second time, sense wire X2 and X4 are set to measurement passage.Due to its original state identical (being driving condition), therefore the starting potential value measuring on passage can be identical, and the variation of the capacitance that its steady state voltage value can the mutual electric capacity of actual response.Similarly, the driving panel in Fig. 9 is when scanning for the first time, and sense wire X2 and X4 are floating.Then,, when scanning for the second time, sense wire X2 and X4 are set to measurement passage.Due to its original state identical (being floating), therefore the starting potential value measuring on passage can be identical.
Figure 10 is another scanning sequency embodiment according to the scan method of Fig. 4.In this embodiment the sense wire number that measures of wish be set as 3, and sense wire X1, X2 in described directions X sense wire and X3 are set to initial measurement passage.Driving panel in Figure 10 is when scanning for the first time, and sense wire X4, X5 and X6 are driving condition.Then,, when scanning for the second time, sense wire X4, X5 and X6 are set to measurement passage.Due to its original state identical (being driving condition), therefore the starting potential value measuring on passage can be identical.
Similarly, Figure 11 is the another scanning sequency embodiment according to the scan method of Fig. 4.The sense wire number that institute's wish measures in this scanning sequency embodiment is set as 4, and sense wire X1, X2, X3 and X4 in described directions X sense wire is set to initial measurement passage.Driving panel in Figure 11 is when scanning for the first time, and sense wire X5, X6, X7 and X8 are driving condition.Then,, when scanning for the second time, sense wire X5, X6, X7 and X8 are set to measurement passage.Due to its original state identical (being driving condition), therefore the starting potential value measuring on passage can be identical.According to yet another embodiment of the invention, the driving panel in Figure 11 is when scanning for the first time, and sense wire X5, X6, X7 and X8 can be floating.
According to the minimum value of its directions X sense wire number of the contact panel of scan method of the present invention or Y-direction sense wire number can with the sense wire number that measures of wish relevant.In a preferred embodiment, the minimum value of directions X sense wire number or Y-direction sense wire number is to determine according to following equation (1):
Num＝4×N
SET-2 (1)
Wherein, Num represents the minimum value of directions X sense wire number or Y-direction sense wire number, and N
sETthe setting number that represents initial measurement passage.For example, as shown in figure 10, when the sense wire number that measures of wish while being set as 3, its directions X sense wire number of contact panel or Y-direction sense wire number at least need 4 * 3-2=10 bar, can this contact panel directions X sense wire of complete detection or all nodes of Y-direction sense wire.In another embodiment, as shown in figure 11, when the sense wire number that measures of wish while being set as 4, its directions X sense wire number of contact panel or Y-direction sense wire number at least need 4 * 4-2=14 bar, can this contact panel directions X sense wire of complete detection or all nodes of Y-direction sense wire.
Technology contents of the present invention and technical characterstic disclose as above, yet those skilled in the art still may be based on instruction of the present invention and enlightenments and done all replacement and modifications that does not deviate from spirit of the present invention.Therefore, protection scope of the present invention should be not limited to the disclosed technology contents of embodiment, and should comprise various replacement and the modifications that do not deviate from spirit of the present invention.
Claims (14)
1. a scan method, be applied in a contact panel, described contact panel comprises many directions X sense wires and many Y-direction sense wires, described directions X sense wire and described Y-direction sense wire are for being crisscross arranged, and a plurality of mutual electric capacity is formed between each directions X sense wire and each Y-direction sense wire, and described scan method comprises following steps:
The sense wire number of selecting wish to measure;
According to described sense wire number, select many first sense wires in described directions X sense wire as measuring passage;
When scanning for the first time, output one drives signal to described many first sense wires other sense wires in addition;
When scanning for the first time, the voltage difference that detection is positioned at two the first voltages on this measurement passage is to produce a corresponding touch sense signals;
When scanning for the second time, export described driving signal to described the first sense wire; And
When scanning for the second time, the voltage difference that the sense wire number detection measuring according to described wish is positioned at two second voltages on the measurement passage after displacement is to produce a corresponding touch sense signals;
According to described those touch sense signals with sensing position of touch.
2. scan method according to claim 1, the arrangement mode that is wherein set as measuring described many sense wires of passage is adjacent one another are.
3. scan method according to claim 1, is wherein set as measuring the arrangement mode of described many sense wires of passage for being spaced.
4. scan method according to claim 1, wherein further comprises the step that decides user's touch position according to described the first voltage and described second voltage.
5. scan method according to claim 1, wherein said contact panel is according to following equation, to determine the minimum value of described directions X sense wire number or described Y-direction sense wire number:
Num=4×N
SET-2；
Wherein, Num represents the minimum value of described directions X sense wire number or described Y-direction sense wire number, and N
sETrepresent the sense wire number that described wish measures.
6. a scan method, be applied in a contact panel, described contact panel comprises many directions X sense wires and many Y-direction sense wires, described directions X sense wire and described Y-direction sense wire are for being crisscross arranged, and a plurality of mutual electric capacity is formed between each directions X sense wire and each Y-direction sense wire, and described scan method comprises following steps:
The sense wire number of selecting wish to measure;
According to described sense wire number, select many first sense wires in described directions X sense wire as a measurement passage;
When scanning for the first time, output one drives signal to other sense wires on directions X sense wire described in described Y-direction sense wire suspension joint;
When scanning for the first time, the voltage difference that detection is positioned at two the first voltages on described measurement passage is to produce a corresponding touch sense signals;
When scanning for the second time, many first sense wires described in suspension joint; And
When scanning for the second time, the voltage difference that the sense wire number detection measuring according to this wish is positioned at two second voltages on the measurement passage after displacement is to produce a corresponding touch sense signals;
According to described those touch sense signals with sensing position of touch.
7. scan method according to claim 6, the arrangement mode that is wherein set as measuring described many sense wires of passage is adjacent one another are.
8. scan method according to claim 6, is wherein set as measuring the arrangement mode of described many sense wires of passage for being spaced.
9. scan method according to claim 6, wherein further comprises the step that decides user's touch position according to described the first voltage and described second voltage.
10. scan method according to claim 6, wherein said contact panel is according to following equation, to determine the minimum value of described directions X sense wire number or described Y-direction sense wire number:
Num=4×N
SET-2；
Wherein, Num represents the minimum value of described directions X sense wire number or described Y-direction sense wire number, and N
sETrepresent the sense wire number that described wish measures.
11. 1 kinds of touch-control input devices, comprise:
One contact panel, comprises:
Many directions X sense wires;
Many Y-direction sense wires, wherein said directions X sense wire and described Y-direction sense wire are for being crisscross arranged; And
A plurality of mutual electric capacity, is formed at described in each directions X sense wire and described in each between Y-direction sense wire; And
One panel drive circuit, in order to drive described contact panel, described panel drive circuit comprises:
One selects circuit, for the sense wire number measuring according to wish, selects and displacement one measurement passage;
One drive signal generation circuit, for selecting the output signal output one of circuit to drive signal to described measurement passage other sense wires in addition according to this; And
One testing circuit, for detection of two voltages that are positioned on described measurement passage.
12. touch-control input devices according to claim 11, the arrangement mode of described many sense wires in wherein said measurement passage is adjacent one another are.
13. touch-control input devices according to claim 11, the arrangement mode of described many sense wires in wherein said measurement passage is for being spaced.
14. touch-control input devices according to claim 11, wherein further comprise a decision circuitry, judge user's touch position for described two voltages that detect according to described testing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010264390.5A CN102375594B (en) | 2010-08-27 | 2010-08-27 | Touch input device and scanning method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010264390.5A CN102375594B (en) | 2010-08-27 | 2010-08-27 | Touch input device and scanning method thereof |
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| CN101561733A (en) * | 2008-04-18 | 2009-10-21 | 义隆电子股份有限公司 | Method for detecting capacitive type touch-control device |
| CN101593065A (en) * | 2008-05-27 | 2009-12-02 | 宸鸿光电科技股份有限公司 | Capacitive touch device and method thereof |
| CN101639748A (en) * | 2008-07-29 | 2010-02-03 | 义隆电子股份有限公司 | Capacitive touch device and detection method thereof |
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| CN101561733A (en) * | 2008-04-18 | 2009-10-21 | 义隆电子股份有限公司 | Method for detecting capacitive type touch-control device |
| CN101593065A (en) * | 2008-05-27 | 2009-12-02 | 宸鸿光电科技股份有限公司 | Capacitive touch device and method thereof |
| CN101639748A (en) * | 2008-07-29 | 2010-02-03 | 义隆电子股份有限公司 | Capacitive touch device and detection method thereof |
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