CN103186298B - The low standby power consumption drive method of capacitance type multi-point touch-control and device - Google Patents
The low standby power consumption drive method of capacitance type multi-point touch-control and device Download PDFInfo
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- CN103186298B CN103186298B CN201110451266.4A CN201110451266A CN103186298B CN 103186298 B CN103186298 B CN 103186298B CN 201110451266 A CN201110451266 A CN 201110451266A CN 103186298 B CN103186298 B CN 103186298B
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Abstract
The present invention provides low standby power consumption drive method and the device of capacitance type multi-point touch-control。One capacitance type touch-control panel has in a plurality of first conductor lines of first direction distribution and in a plurality of second conductor lines of second direction distribution。One driving device is connected to one first switch device, in order to via the first switch device, and then drives capacitance type touch-control panel。One sensing device is connected to one second switch device, in order to via the second switch device, and senses the signal of this capacitance type touch-control panel。One control device sets the first switch device and the second switch is installed on a self induction pattern, in order to make driving device and sensing device perform the detecting of self induction electric capacity, and setting the first switch device and the second switch are installed on a mutual induction pattern, in order to make driving device and sensing device perform the detecting of mutual induction electric capacity。
Description
Technical field
The present invention relates to the technical field of contact panel, the low standby power consumption drive method of espespecially a kind of capacitance type multi-point touch-control and device。
Background technology
Modern consumption electronic installation many outfits Trackpad is as one of its input equipment。For meeting the demands such as light, thin, short, little, Trackpad is also many and panel is integrated into contact panel, in order to facilitate user to input。Trackpad can be divided into resistance-type, condenser type, acoustic wave and optical profile type etc. four kinds according to the difference of sensing principle。
The know-why of contact panel is when finger or other media touch screen, according to different induction modes, detecting voltage, electric current, sound wave or infrared ray etc., and then measures the coordinate position of touch point。Such as resistance-type is and utilizes upper and lower interelectrode potential difference, detects touch point place in order to calculate compression point position。Capacitance type touch-control panel is to utilize capacitance variations produced by the electrostatical binding between the transparency electrode and the human body that arrange, detects its coordinate from produced curtage。
The method that general capacitance type touch-control panel drives is to sense each strip conductor line direct-to-ground capacitance, determine whether that object is near capacitance type touch-control panel by the change of direct-to-ground capacitance value, this is existing self induction electric capacity (selfcapacitance) sensing, wherein, self induction electric capacity or direct-to-ground capacitance are not entity capacitance, and it is parasitism and the stray capacitance of each strip conductor line。Fig. 1 is the schematic diagram that existing self induction electric capacity (selfcapacitance) senses, it is in the cycle very first time, first driven the conductor lines of first direction by the driving of first direction and sensor 110, charge in order to the self induction electric capacity of the conductor lines to first direction。Then at the second time cycle, drive and the voltage in the conductor lines of first direction detected by sensor 110。Again in the 3rd time cycle, the driving of second direction and sensor 120 drive the conductor lines of second direction, charge in order to the self induction electric capacity of the conductor lines to second direction。Then at the 4th time cycle, drive and the voltage in the conductor lines of second direction detected by sensor 120。
Existing self induction electric capacity (selfcapacitance) method for sensing in Fig. 1 is to be simultaneously connected with drive circuit and sensing circuit in same conductor lines, after first conductor lines being driven, same conductor lines is sensed the variable quantity of its signal again, to determine self induction capacitance size。Its benefit is:
(1) data volume is less, and the single picture frame (frame) of contact panel only has m+n pen data, saves hardware cost。
(2) picture frame column data (framerowdata) obtain quickly, therefore the time needed for sensing touch points is less。Because all first direction conductor lines can sense or sense one by one simultaneously, then all of conductor lines of second direction is driven and senses simultaneously again, the different directions conductor lines sensor operation of twice just can finish a picture frame, therefore data volume is less, transferred sensing signal to time needed for digital signal by analogue signal in execution also few a lot of simultaneously。
(3) owing to the amount of data process is less, so having relatively low power consumption。
But the corresponding shortcoming of self induction electric capacity (selfcapacitance) method for sensing is then:
(1) when contact panel has suspension joint conductor, such as water droplet, oil stain etc., it is easy to cause touch points to judge by accident。
(2) when contact panel has multi-point touch simultaneously, can there's something fishy some phenomenon (ghostpointeffect), cause self induction electric capacity (selfcapacitance) method for sensing be difficult to support multi-point touch application。
The method that another capacitance type touch-control panel drives is the size variation of sensing mutual induction electric capacity (mutualcapacitance) Cm, in order to determine whether that object is near contact panel, similarly, mutual induction electric capacity Cm is not entity capacitance, its be first direction conductor lines and the conductor lines of second direction between mutual induction electric capacity Cm。Fig. 2 is the schematic diagram of existing mutual induction electric capacity Cm sensing, as shown in Figure 2, driver 210 is configured on first direction (Y), sensor 220 is configured in second direction (X), when very first time cycle T 1 first half cycle, by driver 210, the conductor lines 230 of first direction is driven, it uses voltage Vy_1 that mutual induction electric capacity Cm250 is charged, when the very first time in the 1 later half cycle of cycle T, all the sensors 220 senses the voltage Vo_1 in the conductor lines 240 of all second directions, Vo_2, ..., Vo_n, in order to obtain n data, after m drive cycle, m × n data can be obtained。
The advantage of mutual induction electric capacity Cm method for sensing is:
(1) the signal different directions of suspension joint conductor and earth conductor, therefore can determine whether that human body is touched very easily。
(2) with the true coordinate of each point, when multiple spot touches simultaneously, it is possible to telling the actual position of each point, mutual induction electric capacity Cm method for sensing easily supports the application of multi-point touch。
Its shortcoming is then:
(1) single picture frame column data (framerowdata) data volume is n × m, and it is much larger than the data volume of self induction electric capacity (selfcapacitance) method for sensing。
(2) direction must be selected, scan one by one, for instance: when first direction Y has 20 strip conductor line, then need to do the action of 20 sensings, just can obtain a complete picture frame column data (framerowdata)。Simultaneously as data volume is big, then increase many performing to be transferred sensing signal to time needed for digital signal by analogue signal。
(3) owing to data volume is much larger, the power consumption that data process also can rise therewith。
Therefore, the real space still having improvement of the technology of existing detecting capacitance type touch control panel。
Summary of the invention
The purpose of the present invention essentially consists in the low standby power consumption drive method and device that provide a kind of capacitance type multi-point touch-control, to reduce the purpose of power consumption, thus can be applicable in handheld apparatus, to extend the handheld apparatus use time。
A characteristic according to the present invention, the present invention proposes the low standby power loss drive system of a kind of capacitance type multi-point touch-control, comprises a capacitance type touch-control panel, one first switch device, one second switch device, a driving device, a sensing device and a control device。This capacitance type touch-control panel has a plurality of first conductor lines being distributed in first direction (Y) and a plurality of second conductor lines being distributed in second direction (X)。This first switch device is connected to this capacitance type touch-control panel。This second switch device is connected to this capacitance type touch-control panel。This driving device is connected to this first switch device, with via this first switch device, and drives this capacitance type touch-control panel。This sensing device is connected to this second switch device, with via this second switch device, and senses the signal of this capacitance type touch-control panel。This control device is connected to this first switch device, this second switch device, this driving device and this sensing device, thus setting this first switch device and this second switch is installed on a self induction pattern, so that this driving device and this sensing device perform self induction electric capacity (selfcapacitance) detecting, and set this first switch device and this second switch is installed on a mutual induction pattern, so that this driving device and this sensing device perform mutual induction electric capacity (mutualcapacitance) detecting。
Another characteristic according to the present invention, the present invention proposes the low standby power consumption drive method of a kind of capacitance type multi-point touch-control, it is for a capacitance type multi-point touch-control system, this system includes a capacitance type touch-control panel, one first switch device, one second switch device, one driving device, one sensing device, and one control device, this capacitance type touch-control panel has a sleep pattern, one self induction capacitive, and a mutual induction capacitive, the method comprises: A) when this capacitance type touch-control panel is entered this self induction capacitive by this sleep pattern, this control device judges whether the self induction electric capacity of this capacitance type touch-control panel changes, if, perform step B, if not, resumes step A；B) this control device judges whether there is the touch points more than or equal to one second preset number (A1=A2) on this capacitance type touch-control panel, if having, performs step C；C) this control device sets this first switch device and this second switch device, to allow this capacitance type touch-control panel enter this mutual induction capacitive, and allow this sensing device perform mutual induction electric capacity (mutualcapacitance) detecting, this control device judges whether the mutual induction electric capacity of this capacitance type touch-control panel changes, if, perform step D, if it is not, resumes step C；D) this control device judges whether there is the touch points more than or equal to one first preset number (B1=B2) on this capacitance type touch-control panel, if having, performs step C。
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing self induction capacitance sensing。
Fig. 2 is the schematic diagram of existing mutual induction capacitance sensing。
Fig. 3 is the block chart of the low standby power loss drive system of capacitance type multi-point touch-control of the present invention。
Fig. 4 is the circuit diagram that the low standby power loss drivetrain of capacitance type multi-point touch-control of the present invention unifies embodiment。
Fig. 5 is the schematic diagram that the present invention performs the detecting of this first direction self induction electric capacity。
Fig. 6 is the schematic diagram that the present invention performs the detecting of this second direction self induction electric capacity。
Fig. 7 is the schematic diagram that the present invention performs the detecting of mutual induction electric capacity。
Fig. 8 is the circuit diagram of low standby power loss another embodiment of drive system of capacitance type multi-point touch-control of the present invention。
Fig. 9 is the schematic diagram that the present invention performs the detecting of this first direction self induction electric capacity。
Figure 10 is the schematic diagram that the present invention performs the detecting of mutual induction electric capacity。
Figure 11 is the circuit diagram of the another embodiment of low standby power loss drive system of capacitance type multi-point touch-control of the present invention。
Figure 12 is the flow chart of the low standby power consumption drive method of capacitance type multi-point touch-control of the present invention。
[main element symbol description]
Drive and sensor 110 drives and sensor 120
Driver 210 sensor 220
The conductor lines 240 of conductor lines 230 second direction of first direction
The low standby power loss drive system 300 of capacitance type multi-point touch-control
Capacitance type touch-control panel 310 first switch device 320
Second switch device 330 driving device 340
Sensing device 350 controls device 360
First conductor lines 311 second conductor lines 312
Switch 321 driver 341
Mutual tolerance driver 343 is from holding driver and sensor 345
Switch 331 sensor 351
Mutual tolerance sensor 353
Step A～step D
End 321a, 321b, 321c, 331a, 331b, 331c
End 321A, 321B, 331A, 331B
Detailed description of the invention
Fig. 3 is the block chart of the low standby power loss drive system 300 of capacitance type multi-point touch-control of the present invention, and the low standby power loss drive system 300 of this capacitance type multi-point touch-control comprises capacitance type touch-control panel 310,1 first switch device 320,1 second switch device 330, driving device 340, sensing device 350 and and controls device 360。
This capacitance type touch-control panel 310 has a plurality of first conductor lines 311 (Y1～Y6) being distributed in first direction (Y) and a plurality of second conductor lines 312 (X1～X6) being distributed in second direction (X)。
This first switch device 320 is connected to this capacitance type touch-control panel 310。Furthermore, this first switch device 320 is connected to this plurality of first conductor lines 311 (Y1～Y6) or this plurality of second conductor lines 312 (X1～X6)。
This second switch device 330 is connected to this capacitance type touch-control panel 310。Furthermore, this second switch device 330 is connected to this plurality of first conductor lines 311 (Y1～Y6) or this plurality of second conductor lines 312 (X1～X6)。
This driving device 340 is connected to this first switch device 320, with via this first switch device 320, and then drives this capacitance type touch-control panel 310。
This sensing device 350 is connected to this second switch device 330, with via this second switch device 330, and senses the signal of this capacitance type touch-control panel 310。
This control device 360 is connected to this first switch device 320, this the second switch device 330, this driving device 340, and this sensing device 350, thus setting this first switch device 320 and this second switch device 330 in a self induction pattern, in order to make this driving device 340 and this sensing device 350 perform self induction electric capacity (selfcapacitance) detecting, and set this first switch device 320 and this second switch device 330 in a mutual induction pattern, in order to make this driving device 340 and this sensing device 350 perform mutual induction electric capacity (mutualcapacitance) detecting。
When this sensing device 350 perform mutual induction electric capacity (mutualcapacitance) detect time, when this control device 360 judges to have on this capacitance type touch-control panel 310 touch points less than one first preset number (B1=B2), this control device 360 sets this first switch device 320 and this second switch device 330, to allow this sensing device 350 perform self induction electric capacity (selfcapacitance) detecting。Wherein, this first preset number (B1) is preferably 1。
When this sensing device 350 performs mutual induction electric capacity (mutualcapacitance) detecting, when this control device 360 judges the touch points having on this capacitance type touch-control panel 310 more than or equal to this first preset number (B1=B2), this control device 360 maintains the setting of this first switch device 320 and this second switch device 330, to allow this sensing device 350 perform mutual induction electric capacity (mutualcapacitance) detecting。
When this sensing device 350 perform self induction electric capacity (selfcapacitance) detect time, when this control device 360 judges to have on this capacitance type touch-control panel 310 touch points less than one second preset number (A1=A2), this control device 360 maintains the setting of this first switch device 320 and this second switch device 330, to allow this sensing device 350 perform self induction electric capacity (selfcapacitance) detecting, wherein, this second preset number (A1) is preferably 2。
When this sensing device 350 perform self induction electric capacity (selfcapacitance) detect time, when this control device 360 judges the touch points having on this capacitance type touch-control panel 310 more than or equal to this second preset number (A1=A2), this control device 360 sets this first switch device 320 and this second switch device 330, in order to allow this sensing device 350 perform mutual induction electric capacity (mutualcapacitance) detecting。
Fig. 4 is the circuit diagram that the low standby power loss drivetrain of capacitance type multi-point touch-control of the present invention unifies embodiment, wherein, this capacitance type touch-control panel 310 has in k bar first conductor lines 311 of first direction distribution and in k bar second conductor lines 312 of second direction distribution, wherein, k is the positive integer more than 2, this k bar first conductor lines 311 is respectively provided with parasitic capacitance and stray capacitance with this k bar second conductor lines 312, and the place of being stacked between this k bar first conductor lines 311 and this k bar the second conductor lines 312 forms Inductance and Capacitance Cm。For convenience of description, in the present embodiment, k is 6。
This first switch device 320 has 61 to 2 switch 321, this driving device 340 has 6 drivers 341, wherein, first end 321a of i-th 1 to 2 switch 321 is connected to i-th driver, its second end 321b is connected to i-th the second conductor lines 312 (Xi), its the 3rd end 321c is connected to i-th article of first conductor lines 311 (Yi), in the middle of, 1 i 6, and for example it is known by a person skilled in the art that this 1 to 2 switch 321 can be controlled so that its first end 321a is connected to the second end 321b or the first end 321a and is connected to the 3rd end 321c。
This second switch device 330 has 62 to 1 switch 331, this sensing device 350 has 6 sensors 351, wherein, first end 331a of i-th 2 to 1 switch is connected to i-th sensor, its second end 331b is connected to i-th the first conductor lines (Yi), its the 3rd end 331c is connected to i-th article of second conductor lines (Xi), and for example it is known by a person skilled in the art that this 2 to 1 switch 331 can be controlled so that its second end 331b is connected to the first end 331a or the 3rd end 331c is connected to the first end 321a。
The detecting of this self induction electric capacity (selfcapacitance) can be divided into a first direction (Y) self induction electric capacity (selfcapacitance) detecting and a second direction (X) self induction electric capacity (selfcapacitance) detecting。
Fig. 5 is the schematic diagram that the present invention performs that this first direction (Y) self induction electric capacity (selfcapacitance) is detected。As shown in Figure 5, when performing this first direction (Y) self induction electric capacity (selfcapacitance), this control device 360 sets i-th 1 to 2 switch 321 and i-th 2 to 1 switch 331, so that i-th driver 341 is connected to i-th the first conductor lines 311 (Yi), i-th sensor 351 is connected to i-th the first conductor lines 311 (Yi)。It is connected with its 3rd end 321c by the first end 321a of i-th 1 to 2 switch 321, and the first end 331a of i-th 2 to 1 switch 331 connects its second end 331b。
Fig. 6 is the schematic diagram that the present invention performs that this second direction (X) self induction electric capacity (selfcapacitance) is detected。As shown in Figure 6, when performing this second direction (X) self induction electric capacity, this control device 360 sets i-th 1 to 2 switch 321 and i-th 2 to 1 switch 331, so that i-th driver 341 is connected to i-th the second conductor lines 312 (Xi), i-th sensor 351 is connected to i-th the second conductor lines 312 (Xi)。It is connected with its second end 321b by the first end 321a of i-th 1 to 2 switch 321, and the first end 331a of i-th 2 to 1 switch 331 connects its 3rd end 331c。
Fig. 7 is the schematic diagram that the present invention performs that mutual induction electric capacity (mutualcapacitance) is detected。As shown in Figure 7, when performing the detecting of this mutual induction electric capacity, this control device 360 sets i-th 1 to 2 switch 321 and i-th 2 to 1 switch 331, so that i-th driver 341 is connected to i-th the first conductor lines 311 (Yi), i-th sensor 351 is connected to i-th the second conductor lines 312 (Xi)。It is connected with its 3rd end 321c by the first end 321a of i-th 1 to 2 switch 321, and the first end 331a of i-th 2 to 1 switch 331 connects its 3rd end 331c。
Fig. 8 is the circuit diagram of low standby power loss another embodiment of drive system of capacitance type multi-point touch-control of the present invention, wherein, this capacitance type touch-control panel 310 has in m bar first conductor lines 311 of first direction distribution and in n bar second conductor lines 312 of second direction distribution, wherein, m, n is positive integer, and m is not equal to n, this m bar first conductor lines 311 is respectively provided with parasitic capacitance and stray capacitance with this n bar second conductor lines 312, and the place of being stacked between this m bar first conductor lines 311 and this n bar the second conductor lines 312 forms Inductance and Capacitance Cm。For convenience of description, in the present embodiment, m is 6, n is 4。
This first switch device 320 has m m+n to 1 switch 321, this driving device 340 has m driver 341, this sensing device 350 has n sensor 351, first end 321A of jth m+n to 1 switch 321 is connected to j-th strip the first conductor lines 311 (Yj), its second end is respectively connecting to this m driver 341 and this n sensor 351 to m+n+1 end 321B, wherein, 1 j m, and for example it is known by a person skilled in the art that this m+n to 1 switch 321 can controlled one of them be connected to the first end 321A to select the second end 321B。This second switch device 330 has n 1 to m+n switch 331, first end 331A of g 1 to m+n switch 331 is connected to the g article second conductor lines 312 (Xg), its second end is respectively connecting to this m driver 341 and this n sensor 351 to m+n+1 end 331B, 1 g n, and for example it is known by a person skilled in the art that this 1 to m+n switch 331 is can be controlled so that its first end 331A is connected to one of them second end 331B。
As shown in Figure 8, this driving device 340 has 6 drivers 341 (D1～D6), this sensing device 350 has 4 sensors 351 (S1～S4), this the first switch device 320 has 6 10 to 1 switch 321, first end 321A of the 1st 10 to 1 switch 321 is connected to the 1st article of first conductor lines 311 (Y1), and its second end is respectively connecting to these 6 drivers 341 and this 4 sensors 351 to the tenth one end 321B。The connected mode of other 10 to 1 switch 321 can the rest may be inferred。This second switch device 330 has 41 to 10 switch 331, first end 331A of the 1st 1 to 10 switch 331 is connected to the 1st article of the second conductor lines 312X1, and its second end is respectively connecting to these 6 drivers 341 and this 4 sensors 351 to the tenth one end 331B。The connected mode of other 1 to 10 switch 331 can the rest may be inferred。
The detecting of this self induction electric capacity can be divided into the detecting of a first direction (Y) self induction electric capacity and a second direction (X) self induction electric capacity (selfcapacitance) detecting。
Fig. 9 is the schematic diagram that the present invention performs this first direction (Y) and second direction (X) self induction electric capacity (selfcapacitance) is detected。As shown in Figure 9, when performing this first direction (Y) self induction electric capacity, this control device 360 sets the 1st 10 to 1 switch 321, so that the 1st driver 341 (D1) is connected to the 1st article of first conductor lines 311 (Y1), 1st sensor 351 (S1) is connected to the 1st article of first conductor lines 311 (Y1), thus the electric capacity sensed on the 1st article of first conductor lines 311 (Y1)；The 1st driver 341 (D1) is made to be connected to the 2nd article of first conductor lines 311 (Y2) again, 1st sensor 351 (S1) is connected to the 2nd article of first conductor lines 311 (Y2), thus the electric capacity sensed on the 2nd article of first conductor lines 311 (Y2)；The 1st driver 341 (D1) is made to be connected to the 3rd article of first conductor lines 311 (Y3) again, 1st sensor 351 (S1) is connected to the 3rd article of first conductor lines 311 (Y3), thus the electric capacity sensed on the 3rd article of first conductor lines 311 (Y3)；The rest may be inferred until sensing the 6th article of first conductor lines 311 (Y6) on electric capacity。Wherein, the 1st driver 341 and the 1st sensor 351 are only used。
And when performing this second direction (X) self induction electric capacity, this control device 360 sets the 1st 1 to 10 switch 331, so that the 1st driver 341 (D1) is connected to the 1st article of second conductor lines 312 (X1), 1st sensor 351 (S1) is connected to the 1st article of second conductor lines 312 (X1), thus the electric capacity sensed on the 1st article of two conductor lines 312 (X1)；The 1st driver 341 (D1) is made to be connected to the 2nd article of second conductor lines 312 (X2) again, 1st sensor 351 (S1) is connected to the 2nd article of second conductor lines 312 (X2), thus the electric capacity sensed on the 2nd article of second conductor lines 312 (X2)；The 1st driver 341 (D1) is made to be connected to the 3rd article of second conductor lines 312 (X3) again, 1st sensor 351 (S1) is connected to the 3rd article of second conductor lines 312 (X3), thus the electric capacity sensed on the 3rd article of second conductor lines 312 (X3)；The rest may be inferred until electric capacity on the 4th article of second conductor lines 312 (X4) of sensing, wherein, only uses the 1st driver 341 and the 1st sensor 351。
Performing the detecting of this first direction (Y) self induction electric capacity and the detecting of this second direction (X) self induction electric capacity, all only use the 1st driver 341 and the 1st sensor 351, so, each driving force is all identical with sensing function, to avoid causing error。
Figure 10 is the schematic diagram that the present invention performs that mutual induction electric capacity (mutualcapacitance) is detected。As shown in Figure 10, when performing the detecting of this mutual induction electric capacity, this control device 360 sets jth 10 to 1 switch 321 and g 1 to 10 switch 331, so that jth driver 341 (Dj) is connected to j-th strip the first conductor lines 311 (Yj), the g sensor 351 (Sg) is connected to the g article second conductor lines 312 (Xg), in the middle of, 1 j 6, 1 g 4, detailed speech, 1st driver 341 (D1) is connected to the 1st article of first conductor lines 311 (Y1), 2nd driver 341 (D2) is connected to the 2nd article of first conductor lines 311 (Y2), 3rd driver 341 (D3) is connected to the 3rd article of first conductor lines 311 (Y3), 4th driver 341 (D4) is connected to the 4th article of first conductor lines 311 (Y4), 5th driver 341 (D5) is connected to the 5th article of first conductor lines 311 (Y5), 6th driver 341 (D6) is connected to the 6th article of first conductor lines 311 (Y6), and the 1st sensor 351 (S1) is connected to the 1st article of second conductor lines 312 (X1), 2nd sensor 351 (S2) is connected to the 2nd article of second conductor lines 312 (X2), 3rd sensor 351 (S3) is connected to the 3rd article of second conductor lines 312 (X3), 4th sensor 351 (S4) is connected to the 4th article of second conductor lines 312 (X4)。
Figure 11 is the circuit diagram of the another embodiment of low standby power loss drive system of capacitance type multi-point touch-control of the present invention, wherein, this capacitance type touch-control panel 310 has in m bar first conductor lines 311 of first direction distribution and in n bar second conductor lines 312 of second direction distribution, wherein, m, n is positive integer, and m can equal or different to n, this m bar first conductor lines 311 is respectively provided with parasitic capacitance and stray capacitance with this n bar second conductor lines 312, and the place of being stacked between this m bar first conductor lines 311 and this n bar the second conductor lines 312 forms Inductance and Capacitance Cm。For convenience of description, in the present embodiment, m is 6, n is 4。
This first switch device 320 has m m+n+z to 1 switch 321, and this driving device 340 has m mutual tolerance driver 343 and z is individual from holding driver and sensor 345。This sensing device 350 has n mutual tolerance sensor 353。In the middle of, m, n, z are positive integer。
First end 321A of jth m+n+z to 1 switch 321 is connected to j-th strip the first conductor lines 311 (Yj), its second end is respectively connecting to this m mutual tolerance driver 343, the individual appearance driver certainly of this z and sensor 345 and this n mutual tolerance sensor 353 to m+n+z+1 end 321B, wherein, 1 j m, and for example it is known by a person skilled in the art that this m+n+z to 1 switch 321 can controlled one of them be connected to the first end 321A to select the second end 321B。
This second switch device 330 has n 1 to m+n+z switch 331, first end 331A of g 1 to m+n+z switch 331 is connected to the g article second conductor lines 312 (Xg), its second end is respectively connecting to this mutual tolerance driver 343, the individual appearance driver certainly of z and sensor 345 and this n mutual tolerance sensor 353 to m+n+z+1 end 331B, 1 g n, and for example it is known by a person skilled in the art that this 1 to m+n+z switch 331 can be controlled so that its first end 331A is connected to one of them second end 331B。
As shown in figure 11, this driving device 340 has 6 mutual tolerance drivers 343 (D1～D6) and 1 from holding driver and sensor 345, this sensing device 350 has 4 mutual tolerance sensors 353, this the first switch device 320 has 6 11 to 1 switch 321, first end 321A of the 1st 11 to 1 switch 321 is connected to the 1st article of first conductor lines 311 (Y1), and its second end is respectively connecting to these 6 drivers 343,1 from holding driver and sensor 345 and this 4 sensors 353 to the 12nd end 321B。The connected mode of other 11 to 1 switch 321 can the rest may be inferred。
This second switch device 330 has 41 to 11 switch 331, first end 331A of the 1st 1 to 11 switch 331 is connected to the 1st article of second conductor lines 312 (X1), and its second end is respectively connecting to these 6 drivers 343,1 from holding driver 345 and this 4 sensors 353 to the 12nd end 331B。The connected mode of other 1 to 11 switch 331 can the rest may be inferred。
In the circuit of Figure 11, carry out self induction electric capacity (selfcapacitance) when detecting, use this 1 from holding driver and sensor 345, respectively via these 6 11 to 1 switch 321 and these 41 to 11 switch 331, and sequentially it is connected to 6 the first conductor lines 311 of this first direction distribution and in 4 the second conductor lines 312 of second direction distribution, thus carrying out self induction electric capacity detecting。
When carrying out the detecting of mutual induction electric capacity, use these 6 mutual tolerance drivers 343 and 4 mutual tolerance sensors 353, respectively via these 6 11 to 1 switch 321 and these 41 to 11 switch 331, and be connected to 6 the first conductor lines 311 of this first direction distribution and in 4 the second conductor lines 312 of second direction distribution, thus carry out mutual induction electric capacity (mutualcapacitance) detecting。
Set as detailed switch, be that those skilled in the art can be readily accomplished based on Fig. 8, Fig. 9, Figure 10 of the present invention and 11, repeat no more。
In the circuit of Figure 11, owing to these 6 mutual tolerance drivers 343 and 4 mutual tolerance sensors 353 only need to realize respectively the circuit that (implement) mutual tolerance drives and mutual tolerance senses, therefore can reduce many compared with the area of 6 drivers 341 in Fig. 8 and 4 sensors 351。
Figure 12 is the flow chart of the low standby power consumption drive method of capacitance type multi-point touch-control of the present invention, the method is for just like capacitance type multi-point touch-control system 300 shown in earlier figures 3, this system 300 includes capacitance type touch-control panel 310,1 first switch device 320,1 second switch device 330, driving device 340, sensing device 350 and and controls device 360, and this capacitance type touch-control panel 310 has a sleep pattern, a self induction capacitive and a mutual induction capacitive。
In step, when this capacitance type touch-control panel 310 is entered this self induction capacitive by this sleep pattern, this control device 360 judges whether the self induction electric capacity of this capacitance type touch-control panel 310 changes, and if so, performs step B, if it is not, resumes step A。This control device 360 judges whether the self induction electric capacity of this capacitance type touch-control panel 310 changes, and compares the self induction capacitance data of this capacitance type touch-control panel 310 that the self induction capacitance data of this capacitance type touch-control panel 310 prestored senses with this sensing device 350。
In stepb, this control device 360 judges whether there is the touch points more than or equal to one second preset number (A1=A2) on this capacitance type touch-control panel 310, if having, performs step C。Wherein, this second preset number (A1=A2) is preferably 2。
In step C, this control device 360 sets this first switch device 320 and this second switch device 330, to allow this capacitance type touch-control panel 310 enter this mutual induction capacitive, and allowing this sensing device 350 perform mutual induction electric capacity (mutualcapacitance) detecting, this control device 360 judges whether the mutual induction electric capacity of this capacitance type touch-control panel 310 changes, if, perform step D, judge by accident in stepb if it is not, express possibility, so resumes step A。
In step C, this control device 360 judges whether the mutual induction electric capacity of this capacitance type touch-control panel 310 changes, and compares the mutual induction capacitance data of this capacitance type touch-control panel 310 that the mutual induction capacitance data of this capacitance type touch-control panel 310 prestored senses with this sensing device 350。
In step D, this control device 360 judges whether there is the touch points more than or equal to one first preset number (B1=B2) on this capacitance type touch-control panel 310, if having, performs step C。Wherein, this first preset number (B1=B2) is preferably 1。
In stepb, this control device 360 judges the touch points being not greater than or being equal to this second preset number (A1=A2) on this capacitance type touch-control panel 310, performs step A。
In other embodiments, when this control device 360 judges that the number of times being not greater than or being equal to the touch points of this second preset number (A1=A2) on this capacitance type touch-control panel 310 is more than a preset value, represent that user does not use this capacitance type touch-control panel 310, sleep pattern can be entered, to save power supply。
In step D, this control device 360 judges the touch points being not greater than or being equal to this first preset number (B1=B2) on this capacitance type touch-control panel 310, performs step A。
From preceding description, time initial, the low standby power loss drive system 300 at capacitance type multi-point touch-control of the present invention is in self induction capacitive, to detect self induction electric capacity, according to the touch point number detected, if touch point sum is less than the second preset number (A1=A2) (such as: 1), then continue to maintain under self induction capacitive, if touch point sum is more than or equal to the second preset number (A1=A2) (such as: 2), then enter mutual induction capacitive, to promote the detection performance of multi-point touch。
After entering mutual induction capacitive, sensing device 350 can sense and obtain corresponding with mutual induction electric capacity voltage signal, after this control device 360 filters the noise in voltage signal, judge the number of actual touch point, if touch point sum is more than or equal to the first preset number (B1=B2) (such as: 1), then continue to maintain mutual induction capacitive, if touch point sum is less than the first preset number (B1=B2) (such as: 0), then rebound uses self induction capacitive, and then saves electric power。Thus, the purpose of power consumption can be reduced, thus can be applicable in handheld apparatus, to extend the handheld apparatus use time。
From the foregoing, no matter the present invention is with regard to purpose, means and effect, all show that it is totally different in the feature of prior art, great practical value。It should be noted that above-mentioned many embodiments are illustrated only for the purposes of explanation, the interest field that the present invention advocates is from being as the criterion with described in claims, but not is only limitted to above-described embodiment。
Claims (20)
1. a low standby power loss drive system for capacitance type multi-point touch-control, comprises:
One capacitance type touch-control panel, have in a plurality of first conductor lines of first direction distribution and in a plurality of second conductor lines of second direction distribution, wherein said first conductor lines and described second conductor lines are respectively provided with parasitic capacitance and stray capacitance, and the place of being stacked between described first conductor lines and described second conductor lines forms Inductance and Capacitance respectively；
One first switch device, is connected to this capacitance type touch-control panel；
One second switch device, is connected to this capacitance type touch-control panel；
One driving device, is connected to this first switch device, in order to via this first switch device, to drive this capacitance type touch-control panel；
One sensing device, is connected to this second switch device, in order to via this second switch device, to sense the signal of this capacitance type touch-control panel；And
One controls device, it is connected to this first switch device, this second switch device, this driving device and this sensing device, thus setting this first switch device and this second switch is installed on a self induction pattern, in order to make this driving device and this sensing device perform the detecting of self induction electric capacity, and set this first switch device and this second switch is installed on a mutual induction pattern, in order to make this driving device and this sensing device perform the detecting of mutual induction electric capacity；
Wherein, when this sensing device performs the detecting of described self induction electric capacity, when this control device judges to have on this capacitance type touch-control panel the touch points less than one second preset number, this control device maintains this first switch device and the setting of this second switch device, to allow this sensing device perform the detecting of described self induction electric capacity, otherwise, this control device sets this first switch device and this second switch device, in order to make this sensing device perform the detecting of described mutual induction electric capacity；
Wherein, this capacitance type touch-control panel has described first conductor lines being distributed in this first direction and is k bar and described second conductor lines that is distributed in this second direction is k bar, this the first switch device has k 1 to 2 switch, this driving device has k driver, first end of i-th 1 to 2 switch is connected to i-th driver, and its second end is connected to i-th the second conductor lines, and its three-terminal link is to i-th article of first conductor lines, in the middle of, 1 i k。
2. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 1, wherein, when this sensing device performs the detecting of described mutual induction electric capacity, when this control device judges to have on this capacitance type touch-control panel the touch points less than one first preset number, this control device sets this first switch device and this second switch device, in order to make this sensing device perform the detecting of described self induction electric capacity。
3. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 2, wherein, when this sensing device performs the detecting of described mutual induction electric capacity, when this control device judges the touch points having on this capacitance type touch-control panel more than or equal to this first preset number, this control device maintains this first switch device and the setting of this second switch device, in order to make this sensing device perform the detecting of described mutual induction electric capacity。
4. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 1, wherein, this the second switch device has k 2 to 1 switch, this sensing device has k sensor, first end of i-th 2 to 1 switch is connected to i-th sensor, its second end is connected to this i-th the first conductor lines, and its three-terminal link is to this i-th article of second conductor lines。
5. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 4, wherein, the detecting of this self induction electric capacity can be divided into the detecting of a first direction (Y) self induction electric capacity and the detecting of a second direction (X) self induction electric capacity。
6. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 5, wherein, when performing this first direction self induction electric capacity, this control device sets this i-th 1 to 2 switch and this i-th 2 to 1 switch, in order to make this i-th driver be connected to this i-th the first conductor lines, and this i-th sensor is connected to this i-th the first conductor lines。
7. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 6, wherein, when performing this second direction self induction electric capacity, this control device sets this i-th 1 to 2 switch and this i-th 2 to 1 switch, in order to make this i-th driver be connected to this i-th the second conductor lines, and this i-th sensor is connected to this i-th the second conductor lines。
8. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 7, wherein, when performing the detecting of this mutual induction electric capacity, this control device sets i-th 1 to 2 switch and i-th 2 to 1 switch, so that i-th driver is connected to i-th the first conductor lines, i-th sensor is connected to i-th the second conductor lines。
9. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 3, wherein, this capacitance type touch-control panel has described first conductor lines being distributed in this first direction and is m bar and described second conductor lines that is distributed in this second direction is n bar, this the first switch device has m m+n to 1 switch, this driving device has m driver, this sensing device has n sensor, first end of jth m+n to 1 switch is connected to j-th strip the first conductor lines, and its second end to m+n+1 end is respectively connecting to this m driver and this n sensor, m, n is positive integer, and m is not equal to n, 1 j m。
10. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 9, wherein, this the second switch device has n 1 to m+n switch, first end of g 1 to m+n switch is connected to the g article second conductor lines, and its second end to m+n+1 end is respectively connecting to this m driver and this n sensor, 1 g n。
11. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 10, wherein, the detecting of this self induction electric capacity can be divided into a first direction self induction electric capacity detecting and second direction self induction electric capacity detecting, when performing the detecting of this first direction self induction electric capacity, this control device sets this jth m+n to 1 switch, in order to make the 1st driver be connected to this j-th strip the first conductor lines, and the 1st sensor is connected to this j-th strip the first conductor lines。
12. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 11, wherein, when performing this second direction self induction electric capacity, this control device sets this g 1 to m+n switch, in order to make the 1st driver be connected to this g article second conductor lines, and the 1st sensor is connected to this g article second conductor lines。
13. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 12, wherein, when performing the detecting of this mutual induction electric capacity, this control device sets this jth m+n to 1 switch and this g 1 to m+n switch, in order to make jth driver be connected to this j-th strip the first conductor lines, and the g sensor is connected to this g article second conductor lines。
14. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 3, wherein, this capacitance type touch-control panel has described first conductor lines being distributed in this first direction and is m bar and described second conductor lines that is distributed in this second direction is n bar, this the first switch device has m m+n+z to 1 switch, this driving device has m mutual tolerance driver and z is individual from holding driver and sensor, this sensing device has n mutual tolerance sensor, first end of jth m+n+z to 1 switch is connected to j-th strip the first conductor lines, its second end to m+n+z+1 end is respectively connecting to this m mutual tolerance driver, this z from holding driver and sensor and this n mutual tolerance sensor, m, n is positive integer, and m is not equal to n, 1 j m。
15. the low standby power loss drive system of capacitance type multi-point touch-control according to claim 14, wherein, this the second switch device has n 1 to m+n+z switch, first end of g 1 to m+n+z switch is connected to the g article second conductor lines, its second end to m+n+z+1 end is respectively connecting to this m mutual tolerance driver, this z is individual holds driver and sensor and this n mutual tolerance sensor, 1 g n certainly。
16. the driving method of a capacitance type multi-point touch-control, for a capacitance type multi-point touch-control system, it includes a capacitance type touch-control panel, one first switch device, one second switch device, a driving device, a sensing device and a control device, this capacitance type touch-control panel has a plurality of first conductor lines and a plurality of second conductor lines, this capacitance type touch-control panel has a sleep pattern, a self induction capacitive and a mutual induction capacitive, and the method comprises:
A) when this capacitance type touch-control panel is entered this self induction capacitive by this sleep pattern, this control device judges whether the self induction electric capacity of this capacitance type touch-control panel changes, and if so, performs step B), if it is not, resumes step A)；
B) this control device judges whether there is the touch points more than or equal to one second preset number on this capacitance type touch-control panel, if having, performs step C)；
C) this control device sets this first switch device and this second switch device, this the first switch device is connected between this driving device and this plurality of first conductor lines, this the second switch device is connected between this plurality of second conductor lines and this sensing device, to allow this capacitance type touch-control panel enter this mutual induction capacitive, and allow this sensing device perform the detecting of mutual induction electric capacity, this control device judges whether the mutual induction electric capacity of this capacitance type touch-control panel changes, if, perform step D), if it is not, resumes step A)；And
D) this control device judges whether there is the touch points more than or equal to one first preset number on this capacitance type touch-control panel, if having, performs step C)。
17. the driving method of capacitance type multi-point touch-control according to claim 16, wherein, in step B) in, when this control device judges to be not greater than on this capacitance type touch-control panel or equal to the touch points of this second preset number, then performs step A)。
18. the driving method of capacitance type multi-point touch-control according to claim 17, wherein, in step D) in, when this control device judges to be not greater than on this capacitance type touch-control panel or equal to the touch points of this first preset number, then performs step A)。
19. the driving method of capacitance type multi-point touch-control according to claim 16, wherein, in step A) in, this control device judges whether the self induction electric capacity of this capacitance type touch-control panel changes, and compares the self induction capacitance data of this capacitance type touch-control panel that the self induction capacitance data that in this capacitance type touch-control panel, prestores arrives with this sensing device senses。
20. the driving method of capacitance type multi-point touch-control according to claim 19, wherein, in step C) in, this control device judges whether the mutual induction electric capacity of this capacitance type touch-control panel changes, and compares the mutual induction capacitance data of this capacitance type touch-control panel that the mutual induction capacitance data that in this capacitance type touch-control panel, prestores arrives with this sensing device senses。
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| CN102945110B (en) * | 2012-11-29 | 2016-01-27 | 旭曜科技股份有限公司 | The noise filtering method of capacitance type touch-control panel and system |
| TWI489365B (en) * | 2013-11-01 | 2015-06-21 | Holtek Semiconductor Inc | Capacitive touch sensor and switching method between self capacitance and mutual capacitance therefor |
| CN105426010A (en) * | 2015-12-15 | 2016-03-23 | 天马微电子股份有限公司 | Drive circuit for touch screen and drive method and display device thereof |
| WO2018112861A1 (en) * | 2016-12-22 | 2018-06-28 | 深圳市汇顶科技股份有限公司 | Capacitance detection circuit and electronic device |
| CN112305320B (en) * | 2020-12-30 | 2021-06-11 | 深圳市汇顶科技股份有限公司 | Proximity detection circuit, wearable device and proximity detection method |
| WO2022141248A1 (en) * | 2020-12-30 | 2022-07-07 | 深圳市汇顶科技股份有限公司 | Proximity detection circuit, wearable device and proximity detection method |
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