CN103365511A

CN103365511A - Method and device for measuring signal of touch screen

Info

Publication number: CN103365511A
Application number: CN2013100252031A
Authority: CN
Inventors: 张钦富
Original assignee: Empia Technology Inc
Current assignee: Egalax Empia Technology Inc
Priority date: 2012-03-29
Filing date: 2013-01-23
Publication date: 2013-10-23
Anticipated expiration: 2033-01-23
Also published as: CN103365511B; CN107092383A; CN107092383B

Abstract

The invention relates to a method and a device for measuring a signal of a touch screen. Each or each set of driving bus bar of the touch screen corresponds to a delay phase difference. Each time when a driving signal is provided, a bus bar measurement signal is detected by at least one of detection bus bars after delaying the delay phase difference corresponding to the one or one set of driving bus bar that is provided with the driving signal.

Description

The measuring signal method and apparatus of touch-screen

Technical field

The invention relates to a kind of method for measurement and device of capacitive touch screen, particularly a kind of method for measurement and device of capacitive touch screen of compensating resistance condenser network phase delay.

Background technology

Capacitive touch screen be see through and human body between capacitive couplings, cause detection signal to change, thereby judge human body in position that capacitive touch screen touches.When human body touched, the noise of human body environment of living in also can along with the capacitive couplings between human body and capacitive touch screen is injected, also change to detection signal.Again since noise constantly changing, and be not easy predicted, when signal to noise ratio hour, cause easily judgement not go out to touch, or the touch location deviation of judging.

In addition, owing to some load circuits of signal process, such as the process capacitive couplings, the signal that the detecting bus the is received signal front with offering the driving bus can produce phase differential.When the cycle that drives signal was all identical, different phase differential represented that the different time of signal delay is received, if ignore the direct measurement signal of aforesaid phase differential, the beginning phase place that can cause measuring signal is different and produce Different Results.If when the result difference that corresponding different bus measures is very large, can cause to be difficult to judge correct position.

This shows that above-mentioned existing technology obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.Therefore how to found a kind of measuring signal method and apparatus of touch-screen of new structure, also becoming the current industry utmost point needs improved target.

Summary of the invention

The object of the invention is to, overcome the defective that existing technology exists, and provide a kind of measuring signal method and apparatus of touch-screen of new structure, technical matters to be solved is to make it in resistor capacitor circuit (RC circuit), signal can have because the load of process is different delay, if ignore such delay, the signal that detects can not meet expection.Purpose of the present invention is given and different time delay (or phase differential) at the different driving bus of correspondence, in the hope of allowing signal optimization or the levelized of the shade that touch-screen detects.

The object of the invention to solve the technical problems realizes by the following technical solutions.The measuring signal method of a kind of touch-screen that proposes according to the present invention, comprising: touch-screen is provided, touch-screen comprises many buss that many driving buss that are arranged in parallel and many detecting buss that are arranged in parallel form, and described driving bus and described detecting bus overlap on a plurality of crossover regions; The phase retardation that determines each bar or each group driving bus is poor; Sequentially provide to drive to the described driving bus one or one group of signal, be provided the driving bus and described detecting bus generation mutual capacitance coupling that drive signal; And when each driving signal is provided, postpone corresponding at least one detecting bus measurement signal of the poor rear ability of phase retardation that is provided one or the one group driving bus that drives signal by described detecting bus.

The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.

Aforesaid measuring signal method is characterized in that determining that each bar or each group drive poor the comprising of phase retardation of bus: sequentially select one of described driving bus or one group of bus as selected bus; And the phase retardation of picking out selected bus in poor by a plurality of predetermined phases is poor, wherein when driving signal and be provided for selected bus, the signal that postpones the poor rear measurement of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor.

Aforesaid measuring signal method when it is characterized in that driving signal and being provided for selected bus, is summations of the signal that measured by one of described detecting bus by the signal of many measurements in the described detecting bus.

Aforesaid measuring signal method when it is characterized in that driving signal and being provided for selected bus, is summations of the signal that measures of at least two detecting buss by described detecting bus by the signal of many measurements in the described detecting bus.

Aforesaid measuring signal method, it is characterized in that determining that each bar or each group drive poor the comprising of phase retardation of bus: select one of described driving bus or one group of bus as the benchmark bus, other or other group bus is as non-benchmark bus; The phase retardation of picking out the benchmark bus in poor by a plurality of predetermined phases is poor, and wherein when driving signal and be provided for the benchmark bus, the signal that postpones the poor rear detecting of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor; Postpone the signal of the poor rear detecting of described phase retardation as reference signal with the benchmark bus; Sequentially select one of described non-benchmark bus or one group of non-benchmark bus as selected bus; And the phase retardation of picking out selected bus in poor by a plurality of predetermined phases is poor, wherein when driving signal and be provided for selected bus, the signal that postpones the poor rear detecting of described phase retardation is compared to postponing signal that other predetermined phase detects after poor close to reference signal.

Aforesaid measuring signal method when it is characterized in that driving signal and being provided for benchmark bus or selected bus, is the signals that measured by one of described detecting bus by the signal of many measurements in the described detecting bus.

Aforesaid measuring signal method, when it is characterized in that driving signal and being provided for benchmark bus or selected bus, are summations of the signal that measures of at least two detecting buss by described detecting bus by the signal of many measurements in the described detecting bus.

The object of the invention to solve the technical problems also realizes by the following technical solutions.The measuring signal method of a kind of touch-screen that proposes according to the present invention, comprising: touch-screen is provided, touch-screen comprises many buss that many driving buss that are arranged in parallel and many detecting buss that are arranged in parallel form, and described driving bus and described detecting bus overlap on a plurality of crossover regions; Drive bus and overlapping each bar of difference or each group detecting bus as the detecting combination with each bar or each group; The phase retardation that determines each detecting combination is poor; Sequentially provide to drive to the described driving bus one or one group of signal, be provided and be provided the driving bus that drives signal and overlapping detecting bus generation mutual capacitance coupling in the detecting combination that drives signal; And each when driving signal and being provided, the signal that is provided each the detecting combination that drives signal is to postpone just to be measured behind the corresponding phase differential.

Aforesaid measuring signal method is characterized in that poor the comprising of phase retardation that determines that each detecting is made up: sequentially select one of described detecting combination as selected detecting combination; And the phase retardation of picking out selected detecting combination in poor by a plurality of predetermined phases is poor, wherein when driving signal and be provided for selected detecting combination, the signal that postpones the poor rear measurement of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor.

Aforesaid measuring signal method is characterized in that poor the comprising of phase retardation that determines that each detecting is made up: select one of described detecting combination as benchmark detecting combination, other detecting is made up as non-benchmark detecting combination; The phase retardation of picking out benchmark detecting combination in poor by a plurality of predetermined phases is poor, and wherein when driving signal and be provided for benchmark detecting combination, the signal that postpones the poor rear detecting of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor; Detect the signal of the poor rear detecting of the described phase retardation of combinatorial delays as reference signal with benchmark; Sequentially select one of described non-benchmark detecting combination as selected detecting combination; And the phase retardation of picking out selected detecting combination in poor by a plurality of predetermined phases is poor, wherein when driving signal and be provided for selected detecting combination, the signal that postpones the poor rear detecting of described phase retardation is compared to postponing signal that other predetermined phase detects after poor close to reference signal.

The object of the invention to solve the technical problems realizes in addition more by the following technical solutions.The measuring signal device of a kind of touch-screen that proposes according to the present invention, comprising: touch-screen, comprise many buss that many driving buss that are arranged in parallel and many detecting buss that are arranged in parallel form, described driving bus and described detecting bus overlap on a plurality of crossover regions; Driving circuit, sequentially provide and drive to the described driving bus one or one group of signal, be provided the driving bus and the described detecting bus that drive signal and produce the mutual capacitance coupling, it is poor that wherein each bar or each group drive the corresponding phase retardation of bus; And circuit for detecting, it is poor and each when driving signal and being provided to determine that each bar or each group drives the phase retardation of bus, postpones to drive the poor rear ability of phase retardation of bus by at least one detecting bus measurement signal of described detecting bus corresponding to being provided or a group of driving signal.

Aforesaid measuring signal device, it is characterized in that driving circuit comprises that more of sequentially selecting described driving bus or one group of bus are as the device of selected bus, and circuit for detecting more comprises the poor device of phase retardation of picking out selected bus in poor by a plurality of predetermined phases, wherein when driving signal and be provided for selected bus, the signal that postpones the poor rear measurement of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor.

Aforesaid measuring signal device when it is characterized in that driving signal and being provided for selected bus, is summations of the signal that measured by one of described detecting bus by the signal of many measurements in the described detecting bus.

Aforesaid measuring signal device when it is characterized in that driving signal and being provided for selected bus, is summations of the signal that measures of at least two detecting buss by described detecting bus by the signal of many measurements in the described detecting bus.

Aforesaid measuring signal device, it is characterized in that driving circuit selects one of described driving bus or one group of bus as the device of benchmark bus, as non-benchmark bus, and driving circuit is sequentially selected one of described non-benchmark bus or one group of non-benchmark bus as selected bus with other or other group bus; The phase retardation of picking out the benchmark bus during circuit for detecting is poor by a plurality of predetermined phases is poor, wherein when the driving signal is provided for the benchmark bus, the signal that postpones the poor rear detecting of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor, and circuit for detecting is to postpone the signal of the poor rear detecting of described phase retardation as reference signal with the benchmark bus, and the phase retardation of picking out selected bus in poor by a plurality of predetermined phases is poor, wherein when driving signal and be provided for selected bus, the signal that postpones the poor rear detecting of described phase retardation is compared to postponing signal that other predetermined phase detects after poor close to reference signal.

Aforesaid measuring signal device when it is characterized in that driving signal and being provided for benchmark bus or selected bus, is the signals that measured by one of described detecting bus by the signal of many measurements in the described detecting bus.

Aforesaid measuring signal device, when it is characterized in that driving signal and being provided for benchmark bus or selected bus, are summations of the signal that measures of at least two detecting buss by described detecting bus by the signal of many measurements in the described detecting bus.

The object of the invention to solve the technical problems also realizes in addition by the following technical solutions.The measuring signal device of a kind of touch-screen that proposes according to the present invention, comprising: touch-screen, comprise many buss that many driving buss that are arranged in parallel and many detecting buss that are arranged in parallel form, described driving bus and described detecting bus overlap on a plurality of crossover regions; Driving circuit, sequentially provide and drive to the described driving bus one or one group of signal, be provided and be provided the driving bus that drives signal in the detecting combination that drives signal and produce the mutual capacitance coupling with overlapping detecting bus, wherein each bar or each group drive bus and respectively overlapping each bar or each group detecting bus to make up corresponding phase retardation as detecting combination and each detecting poor; And circuit for detecting is each when driving signal and being provided, and the signal that is provided each the detecting combination that drives signal is to postpone just to be measured behind the corresponding phase differential.

Aforesaid measuring signal device is characterized in that driving circuit sequentially selects one of described detecting combination as selected detecting combination; And circuit for detecting to pick out the phase retardation of selected detecting combination in poor by a plurality of predetermined phases poor, wherein when driving signal and be provided for selected detecting combination, the signal that postpones the poor rear measurement of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor.

Aforesaid measuring signal device, it is characterized in that driving circuit selects one of described detecting combination as benchmark detecting combination, other detecting combination is as non-benchmark detecting combination, and driving circuit is sequentially selected one of described non-benchmark detecting combination as selected detecting combination; And circuit for detecting to pick out the phase retardation of benchmark detecting combination in poor by a plurality of predetermined phases poor, wherein when the driving signal is provided for benchmark detecting combination, the signal that postpones the poor rear detecting of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor, and circuit for detecting is to detect the signal of the poor rear detecting of the described phase retardation of combinatorial delays as reference signal with benchmark, and the phase retardation of picking out selected detecting combination in poor by a plurality of predetermined phases is poor, wherein when driving signal and be provided for selected detecting combination, the signal that postpones the poor rear detecting of described phase retardation is compared to postponing signal that other predetermined phase detects after poor close to reference signal.

The present invention compared with prior art has obvious advantage and beneficial effect.By above technical scheme as can be known, main technical content of the present invention is as follows: the measuring signal method of a kind of touch-screen that proposes according to the present invention, comprise: touch-screen is provided, touch-screen comprises many buss that many driving buss that are arranged in parallel and many detecting buss that are arranged in parallel form, and described driving bus and described detecting bus overlap on a plurality of crossover regions; A phase retardation that determines each bar or each group driving bus is poor; Sequentially provide to drive to the described driving bus one or one group of signal, be provided the driving bus and described detecting bus generation mutual capacitance coupling that drive signal; And when each driving signal is provided, postpone corresponding at least one detecting bus measurement signal of the poor rear ability of phase retardation that is provided one or the one group driving bus that drives signal by described detecting bus.The measuring signal method of a kind of touch-screen that proposes according to the present invention, comprise: touch-screen is provided, touch-screen comprises many buss that many driving buss that are arranged in parallel and many detecting buss that are arranged in parallel form, and described driving bus and described detecting bus overlap on a plurality of crossover regions; Drive bus and overlapping each bar of difference or each group detecting bus as the detecting combination with each bar or each group; The phase retardation that determines each detecting combination is poor; Sequentially provide to drive to the described driving bus one or one group of signal, be provided and be provided the driving bus that drives signal and overlapping detecting bus generation mutual capacitance coupling in the detecting combination that drives signal; And each when driving signal and being provided, the signal that is provided each the detecting combination that drives signal is to postpone just to be measured behind the corresponding phase differential.The measuring signal device of a kind of touch-screen that proposes according to the present invention, comprise: touch-screen, comprise many buss that many driving buss that are arranged in parallel and many detecting buss that are arranged in parallel form, described driving bus and described detecting bus overlap on a plurality of crossover regions; Driving circuit, sequentially provide and drive to the described driving bus one or one group of signal, be provided the driving bus and the described detecting bus that drive signal and produce the mutual capacitance coupling, it is poor that wherein each bar or each group drive the corresponding phase retardation of bus; And circuit for detecting, it is poor and each when driving signal and being provided to determine that each bar or each group drives the phase retardation of bus, postpones to drive the poor rear ability of phase retardation of bus by at least one detecting bus measurement signal of described detecting bus corresponding to being provided or a group of driving signal.The measuring signal device of a kind of touch-screen that proposes according to the present invention, comprise: touch-screen, comprise many buss that many driving buss that are arranged in parallel and many detecting buss that are arranged in parallel form, described driving bus and described detecting bus overlap on a plurality of crossover regions; Driving circuit, sequentially provide and drive to the described driving bus one or one group of signal, be provided and be provided the driving bus that drives signal in the detecting combination that drives signal and produce the mutual capacitance coupling with overlapping detecting bus, wherein each bar or each group drive bus and respectively overlapping each bar or each group detecting bus to make up corresponding phase retardation as detecting combination and each detecting poor; And circuit for detecting is each when driving signal and being provided, and the signal that is provided each the detecting combination that drives signal is to postpone just to be measured behind the corresponding phase differential.

By technique scheme, the measuring signal method and apparatus of touch-screen of the present invention has following advantages and beneficial effect at least: corresponding different driving bus is given and different time delay (or phase differential), can allow signal optimization or the levelized of the shade that touch-screen detects.

Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and the cooperation accompanying drawing, be described in detail as follows.

Description of drawings

Fig. 1 and Fig. 4 are the synoptic diagram of condenser type touch screen of the present invention and control circuit thereof;

Fig. 2 A is the synoptic diagram of single electrode drive pattern;

The synoptic diagram of the bipolar electrode drive pattern of Fig. 2 B and Fig. 2 C;

Fig. 3 A and Fig. 3 B are the schematic flow sheet of the method for detecting of detecting capacitance type touch-screen of the present invention;

Fig. 5 is for producing the synoptic diagram of complete image;

Fig. 6 is for producing the synoptic diagram that inside contracts image;

Fig. 7 A and Fig. 7 B are for producing the synoptic diagram that extends out image;

Fig. 8 is that the present invention produces the schematic flow sheet that extends out image;

Fig. 9 A and Fig. 9 B produce the poor synoptic diagram of out of phase for driving signal via the different driving bus; And

Figure 10 and Figure 11 are the schematic flow sheet according to the measuring signal method of the touch-screen of the first embodiment of the present invention.

[main element symbol description]

11: frequency circuit 12: pulse width adjusting circuit

131: driving switch 132: detection switch

141: drive and select circuit 142: circuit is selected in detecting

151: drive electrode 152: the detecting electrode

16: variable resistor 17: amplifying circuit

18: measurement circuit 19: the external conductive object

41: driving circuit 42: circuit for detecting

43: storage circuit 44: frequency setting

51: complete image 52: the dimension sensitive information that single electrode drives

61: inside contract image 62: the dimension sensitive information that bipolar electrode drives

71: extend out image 45: controller

One dimension sensitive information of side single electrode driving in 721: the first

One dimension sensitive information of side single electrode driving in 722: the second

S: drive signal

Embodiment

Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, its embodiment of measuring signal method and apparatus, structure, feature and the effect thereof of the touch-screen that foundation the present invention is proposed are described in detail as follows.

Capacitive touch screen is easy to be subject to noise, especially comes from the human body that touches in touch-screen.The present invention adopts the type of drive of adaptability to reach the purpose that reduces noise.

In capacitive touch screen, comprise many vertically and transversely arranged electrode, be used for detecting the position of touch, wherein the consumption of electric power and the number of electrodes that drives with the time and the voltage positive correlation of driving.Touching when detecting, noise may conduct to capacitive touch screen along with the conductor that touches, so that signal to noise ratio (S/Nratio) variation, causes easily erroneous judgement and the position deviation of touch.In other words, signal to noise ratio can dynamically change along with the object and the residing environment that touch.

See also Fig. 1, the synoptic diagram of condenser type touch screen of the present invention and control circuit thereof, comprise frequency circuit 11, pulse width adjusting circuit 12, driving switch 131, detection switch 132, drive select circuit 141, detecting select circuit 142, at least drive electrode 151, detect electrode 152, variable resistor 16, amplifying circuit 17 and measurement circuit 18 at least.Capacitive touch screen can be to comprise many drive electrodes 151 and many detecting electrodes 152, and described drive electrode 151 overlaps on a plurality of overlapping places with described detecting electrode 152.

Frequency circuit 11 provides the frequency signal that whole system is provided according to frequency of operation, and pulse width adjusting circuit 12 adjusts parameter according to frequency signal and pulse width and provide pulse width to adjust signal, to drive drive electrode 151.The driving of driving switch 131 control drive electrodes, and be by selecting circuit 141 to select at least one drive electrode 151.In addition, the electrical couplings between detection switch 132 control drive electrodes and the measurement circuit 18.When driving switch 131 is conducting (on), detection switch 132 is for disconnecting (off), pulse width is adjusted signal via driving the drive electrode 151 of selecting circuit 141 to offer driven selection circuit 141 couplings, wherein drive electrode 151 can be many, and selecteed drive electrode 151 can be one, two or many in the described drive electrode 151.When drive electrode 151 is adjusted signal driver by pulse width, detecting electrode 152 and driven drive electrode 151 overlapping overlapping places can produce capacitive couplings 152, and each bar detecting electrode 152 provides input signal with drive electrode 151 capacitive couplings the time.Variable resistor 16 is to provide impedance according to resistance parameter, input signal is to offer detecting via variable resistor 16 to select circuit 142, detecting is selected circuit 142 by one, two, three, many of selections in many detecting electrodes 152 or all detects electrode 152 to be coupled in amplifying circuit 17, and input signal is according to offering measurement circuit 18 after the gain parameter via amplifying circuit 17.Measurement circuit 18 is to adjust signal and frequency signal detecting input signal according to pulse width, wherein measurement circuit 18 can be to be that detection signal is taken a sample according to phase parameter in phase place at least, for example measurement circuit 18 can be to have at least integrating circuit, each integrating circuit carries out integration in phase place at least to the input signal in the described input signal according to phase parameter respectively, to measure the size of input signal.In example of the present invention, each integrating circuit can also be in phase place at least the signal difference of the pair of input signals in the described input signal to be carried out integration according to phase parameter respectively, or in phase place at least the difference of the signal difference of two pairs of input signals in the described input signal is carried out integration according to phase parameter respectively.In addition, can also to comprise be that few analog-to-digital electricity (ADC) changes into digital signal with the result that integrating circuit detects to measurement circuit 18.In addition, the present technique neck has the those of ordinary skill of common knowledge can know by inference, and aforesaid input signal can be to select circuit 142 to offer measurement circuit 18 by detecting again after amplifying through amplifying circuit 17 first, and the present invention is not limited.

In the present invention, capacitive touch screen has at least two kinds of drive patterns, is divided into single electrode drive pattern, the bipolar electrode drive pattern of power saving, and at least a driving current potential is arranged.Each drive pattern has at least a frequency of operation corresponding to different driving current potentials, the corresponding one group of parameter of each frequency of operation, and each drive pattern is corresponding to different driving current potential representative power consumption in various degree.

The electrode of capacitive touch screen can be divided into many drive electrodes 151 and many detecting electrodes 152, and described drive electrode 151 overlaps on a plurality of overlapping places (intersection) with described detecting electrode 152.See also Fig. 2 A, in the single electrode drive pattern, once drive a drive electrode 151, namely only have at one time a drive electrode 151 to be provided and drive signal S, when arbitrary drive electrode 151 is driven, detect signals of all detecting electrodes 152 to produce a dimension sensitive information.Accordingly, after driving all drive electrodes 151, can obtain the dimension sensitive information corresponding to each bar drive electrode 151, to consist of the complete image with respect to all overlapping places.

See also Fig. 2 B and 2C, in the bipolar electrode drive pattern, once drive adjacent a pair of drive electrode 151.In other words, the drive electrode 151 of n bar will drive n-1 time altogether, and a pair of drive electrode in office 151 is detected signals of all detecting electrodes 152 to produce a dimension sensitive information when driven.For example, at first such as Fig. 2 B, provide simultaneously to drive signal S to first pair of drive electrode 151, if there are 5, will drive 4 times.Next, shown in Fig. 2 C, provide simultaneously to drive signal S to second pair of drive electrode 151, by that analogy.Accordingly, after driving every a pair of drive electrode 151 (altogether n-1 to), can obtain the dimension sensitive information corresponding to every a pair of drive electrode 151, to consist of the image that inside contracts with respect to aforementioned complete image, inside contract the pixel quantity of image less than the pixel quantity of complete image.In another example of the present invention, the bipolar electrode drive pattern comprises that more respectively both sides drive electrode 151 being carried out single electrode drives, and when either side list drive electrode 151 is driven, detect the signal of all detecting electrodes 152 to produce a dimension sensitive information, so that two dimension sensitive informations additionally to be provided, and to inside contract image and form and extend out image.For example place respectively outside the both sides that inside contract image corresponding to a dimension sensitive information of both sides and extend out image with composition.

The ordinary person that the art has common knowledge can know by inference, and the present invention more can comprise three electrode drive patterns, four electrode drive patterns etc., no longer narrates at this.

Aforesaid driving current potential can be to drive current potential including but not limited at least two kinds, and such as low-driving potential and the high current potential that drives, higher driving current potential has higher signal to noise ratio.

According to aforementioned, in the single electrode drive pattern, can obtain complete image, and in the bipolar electrode drive pattern, can obtain and inside contract image or extend out image.Complete image, interior epitome or to extend out image can be to obtain when externally conductive object 19 approaches or touch before the capacitive touch screen with capacitive touch screen are judged the position of external conductive object 19 so as to the variable quantity that produces each pixel.Wherein, described external conductive object 19 can be one or more.Also as aforementioned, external conductive object 19 approaches or when touching capacitive touch screen, or with described drive electrode 151 and described detecting electrode 152 capacitive couplings, and cause noise, even drive electrode 151 does not have when driven, external conductive object 19 also may with described drive electrode 151 and described detecting electrode 152 capacitive couplings.In addition, noise also may disturb from other approach.

Accordingly, in one example of the present invention, when carrying out the noise detection process, driving switch 131 disconnects, and detection switch 132 conductings, this moment, measurement circuit can produce according to the signal of described detecting electrode 152 a dimension sensitive information of noise detecting, whether conformed with permissible range so as to judging noise.For example, can be whether a dimension sensitive information of judging the noise detecting has arbitrary value to surpass the door limit value, or the totalling of all values of a dimension sensitive information of noise detecting or on average whether surpass the door limit value, judge whether noise conforms with permissible range.The technician that the art has a general knowledge can know other dimension sensitive information by the noise detecting by inference and judge the mode whether noise conforms with permissible range, and the present invention is not narrated.

The noise detection process can be when being activated in system or carry out when obtaining each time aforementioned complete image, inside contract image or extending out image, also can be regularly or when repeatedly obtaining aforementioned complete image, inside contract image or extending out image, carry out, or detected when the external conductive object approaches or touches and carried out, the technician that the art has general knowledge can know the opportune moment that other carries out the noise detection process by inference, and the present invention is not limited.

The present invention provides in addition and changes the sound interval order, is to carry out frequency to switch when judging that noise exceeds permissible range.Measurement circuit is provided many class frequencys and sets, and can be to be stored in internal memory or other Storage Media, so that being provided, measurement circuit in changing the sound interval order, selects, and according to the frequency signal of the frequency control frequency circuit 11 of selecting.Changing the sound interval order can be to pick out one by one appropriate frequency at described frequency setting to set, and for example selects one by one wherein class frequency setting and carries out the noise detection process, conforms with permissible range until detect noise.Changing the sound interval order also can be to pick out one by one optimum frequency at described frequency setting to set.For example select one by one and carry out the noise detection process at described frequency setting, detect the wherein frequency setting of noise minimum, as the maximal value that detects a dimension sensitive information of noise detecting is minimum frequency setting, or the totalling of all values of a dimension sensitive information of noise detecting or the frequency setting of average out to minimum.

Described frequency setting corresponds to and includes but not limited to drive pattern, frequency and parameter group.Parameter group can be to include but not limited to be selected from following collection group: aforementioned resistance parameter, aforementioned gain parameter, aforementioned phase parameter and aforementioned pulse width are adjusted parameter, and the present technique neck has the those of ordinary skill of common knowledge can know the correlation parameter that other is applicable to capacitive touch screen and control circuit thereof by inference.

Described frequency setting can be shown in the following tabulation 1, comprises a plurality of driving current potentials, followingly drives current potential and the second driving current potential as example take first, and it can be the driving current potential that has more than three kinds that the ordinary person that the art has common knowledge can know by inference.Each drives current potential can have respectively multiple drive modes, includes but not limited to be selected from the group of following collection: single electrode drive pattern, bipolar electrode drive pattern, three electrode drive patterns, four electrode drive patterns etc.Each drives corresponding each drive pattern of current potential and has respectively multi-frequency, and each frequency is corresponding to a kind of aforesaid parameter group.It can be complete difference that the ordinary person that the art has common knowledge can know each frequency that drives corresponding each drive pattern of current potential by inference, also can be to have part identical, and the present invention is not limited.Table 1

According to above-mentioned, the invention provides a kind of method for detecting of detecting capacitance type touch-screen, see also Fig. 3 A.At first shown in step 310, sequentially store a plurality of frequency settings according to the power consumption size, each frequency setting is respectively corresponding to a kind of a kind of drive pattern that drives current potential, and each frequency setting has frequency and parameter group, and wherein driving current potential has at least a.Next, shown in step 320, the setting of the parameter group initialization circuit for detecting of one of described frequency setting of foundation, and shown in step 330, with the signal of circuit for detecting detecting from described detecting electrode, and produce a dimension sensitive information according to the signal from described detecting electrode according to the parameter group of circuit for detecting.Again next, shown in step 340, judge according to a described dimension sensitive information whether the interference of noise exceeds permissible range.Then, shown in step 350, when the interference of described noise surpasses described permissible range, produce a described dimension sensitive information after the setting that sequentially frequency of one of described frequency setting of foundation and parameter group change respectively described frequency of operation and described circuit for detecting, and judge according to a described dimension sensitive information whether the interference of described noise exceeds described permissible range, until the interference of described noise does not surpass the Cheng Suoshu permissible range.Also can be shown in the step 360 of Fig. 3 B, when the interference of described noise surpasses described permissible range, produce a described dimension sensitive information after the setting that changes respectively described frequency of operation and described circuit for detecting according to frequency and the parameter group of each frequency setting, and judge the interference of described noise according to a described dimension sensitive information, and the setting that changes respectively described frequency of operation and described circuit for detecting with the frequency that is subjected to the minimum frequency setting of described noise and parameter group.

For example shown in Figure 4, the arrangement for detecting for according to a kind of detecting capacitance type touch-screen of the present invention comprises: storage circuit 43, driving circuit 41, circuit for detecting 42.Shown in abovementioned steps 310, storage circuit 43 comprises a plurality of frequency settings 44, sequentially stores according to the power consumption size respectively.Storage circuit 43 can be with circuit, internal memory or any Storage Media that can store electromagnetic recording.In example of the present invention, frequency setting 44 can be that the mode of tabling look-up consists of, and in addition, frequency setting 44 can also store the power consumption parameter.

Driving circuit 41 can be the integrated of a plurality of circuit, includes but not limited to aforesaid frequency circuit 11, pulse width adjusting circuit 12, driving switch 131, detection switch 132 and drive select circuit 141.Institute's column circuits is to make things convenient for the present invention to illustrate in this example, and driving circuit 41 can include only the part circuit or add more multicircuit, and the present invention is not limited.Described driving circuit is to provide according to frequency of operation to drive signal at least drive electrode 151 of capacitive touch screen, wherein capacitive touch screen comprises many drive electrodes 151 and many detecting electrodes 152, and described drive electrode 151 overlaps on a plurality of overlapping places with described detecting electrode 152.

Circuit for detecting 42 can be the integrated of a plurality of circuit, includes but not limited to aforementioned quantities slowdown monitoring circuit 18, amplifying circuit 17, detecting selection circuit 142, but even can be to comprise power transformation group 16.Institute's column circuits is to make things convenient for the present invention to illustrate in this example, and circuit for detecting 42 can include only the part circuit or add more multicircuit, and the present invention is not limited.In addition, circuit for detecting 42 more comprises carries out abovementioned steps 320 to step 340, and execution in step 350 or step 360.In the example of Fig. 3 B, described frequency setting can be sequentially not store according to the power consumption size.

As discussed previously, the described dimension the sensitive information whether interference that is used for judging described noise exceeds described permissible range is not produce when described driving signal offers described drive electrode.For example, be to select circuit 131 for disconnecting and detecting selection circuit 132 in the conducting in driving.

In example of the present invention, at least drive current potential multiple drive modes is arranged, described drive pattern comprises single electrode drive pattern and bipolar electrode drive pattern, wherein only provide one of described drive electrode at the signal of driving described in the single electrode drive pattern with the time, and in the bipolar electrode drive pattern, described driving signal only provides one of described drive electrode right with the time.The power consumption size of wherein said single electrode drive pattern is less than the power consumption size of described bipolar electrode drive pattern.In addition, in described single electrode drive-type, described circuit for detecting is to produce respectively a described dimension sensitive information when each bar drive electrode is provided the driving signal, with the complete image, and wherein in described bipolar electrode drive-type, described circuit for detecting is to produce respectively a described dimension sensitive information when every a pair of drive electrode is provided the driving signal, inside contracts image with formation, and the wherein said pixel of image that inside contracts is less than the pixel of described complete image.In addition, circuit for detecting can more comprise respectively two lateral electrodes are driven in the bipolar electrode drive pattern, and when the single drive electrode of either side is driven, detect the signal of all detecting electrodes to produce respectively a described dimension sensitive information, wherein respectively two lateral electrodes are driven two dimension sensitive informations that produce and be placed in outside the described both sides that inside contract image and extend out image with composition, and the described pixel of image that extends out is greater than the pixel of described complete image.

In another example of the present invention, described driving current potential comprises that first drives current potential and drive current potential with second, wherein produces the power consumption size of described complete image corresponding to the described first described single electrode drive pattern that drives current potential〉produce the described power consumption size that inside contracts image corresponding to the described first described bipolar electrode drive pattern that drives current potential〉to produce the power consumption of described complete image corresponding to the described second described single electrode drive pattern that drives current potential big or small.

In another example of the present invention, described driving current potential comprises that first drives current potential and drive current potential with second, wherein produces the power consumption size of described complete image corresponding to the described first described single electrode drive pattern that drives current potential〉to produce the power consumption of described complete image corresponding to the described second described single electrode drive pattern that drives current potential big or small.

In addition, in example of the present invention, the signal of each bar detecting electrode is to offer described circuit for detecting through variable resistor first respectively again, and described circuit for detecting is to set described variable-resistance impedance according to the parameter group of one of described frequency setting.In addition, the signal of described detecting electrode is first through just being detected behind the amplifying circuit amplifying signal at least, and described circuit for detecting is the gain of setting described amplifying circuit according to the parameter group of one of described frequency setting.Moreover described driving signal is the parameter group generation according to one of described frequency setting.

In the example of the present invention, each value of a described dimension sensitive information is to produce with cycle of setting signal according to described detecting electrode respectively, and the cycle of wherein said setting is to set according to the parameter group of one of described frequency setting.In another example of the present invention, each value of a described dimension sensitive information is to produce with the phase place set at least signal according to described detecting electrode respectively, and the phase place of wherein said setting is to set according to the parameter group of one of described frequency setting.

In addition, aforesaid driving circuit 41, circuit for detecting 42 can be by control circuit 45 controls with storage circuit 43.But control circuit 45 can be the processor of Programming, can be other control circuit also, and the present invention does not limit.

See also Fig. 5, be the synoptic diagram according to single electrode drive pattern of the present invention.Drive signal S and sequentially offer article one drive electrode, second drive electrode ..., to the last drive electrode, and the dimension sensitive information 52 that the generation single electrode drives when the driven signal S of each bar drive electrode drives.Gather the dimension sensitive information 52 that single electrode that each bar drive electrode produces when driven drives, but complete image 51, the respectively capacitively coupled variation of one of corresponding described electrode confluce of each value of complete image 51.

In addition, each value of complete image is respectively corresponding to the position at one of described overlapping place.For example, the middle position of each bar drive electrode is respectively corresponding to first dimension coordinate, and the central authorities of each bar detecting electrode are respectively corresponding to second dimension coordinate.First dimension coordinate can be laterally (or level, X-axis) coordinate and vertical one of (or vertical, Y-axis) coordinate, and second dimension coordinate can be horizontal (or level, X-axis) coordinate and another of vertical (or vertical, Y-axis) coordinate.Each overlapping place is respectively corresponding to the two-dimensions coordinate of the drive electrode that overlaps on overlapping place with the detecting electrode, the two-dimensions coordinate is to be made of first dimension coordinate and second dimension coordinate, such as (first dimension coordinate, second dimension coordinate) or (second dimension coordinate, first dimension coordinate).In other words, the dimension sensitive information that each single electrode drives is respectively corresponding to first dimension coordinates of one of described drive electrode central authorities, and wherein each value (or each value of complete image) of the dimension sensitive information that drives of single electrode is respectively corresponding to first dimension coordinate of one of described drive electrode central authorities and the two-dimensions coordinate of second dimension coordinate formation of one of described detecting electrode central authorities.In like manner, each value of complete image is respectively corresponding to the middle position at one of described overlapping place, namely respectively corresponding to first dimension coordinate of one of described drive electrode central authorities and the two-dimensions coordinate of second dimension coordinate formation of one of described detecting electrode central authorities.

See also Fig. 6, be the synoptic diagram according to bipolar electrode drive pattern of the present invention.Drive signal S and sequentially offer first pair of drive electrode, second pair of drive electrode ..., to the last a pair of drive electrode, and the dimension sensitive information 62 that the generation bipolar electrode drives when the driven signal S of every a pair of drive electrode drives.In other words, N bar drive electrode can consist of N-1 to (many to) drive electrodes.Gather the dimension sensitive information 62 that bipolar electrode that every a pair of drive electrode produces when driven drives, can consist of and inside contract image 61.Inside contract the quantity of value (or pixel) of image 61 less than the quantity of the value (or pixel) of complete image 51.With respect to complete image, inside contract a dimension sensitive information that each bipolar electrode of image drives respectively corresponding to first dimension coordinate of middle position between a pair of drive electrode, and each value is respectively corresponding to first dimension coordinate of middle position between aforementioned a pair of drive electrode and the two-dimensions coordinate of second dimension coordinate formation of one of described detecting electrode central authorities.In other words, each value that inside contracts image is respectively corresponding to the position of central authorities between a pair of overlapping place, namely respectively corresponding to first dimension coordinate of middle position between a pair of drive electrode (or described many to one of drive electrode) and the two-dimensions coordinate of second dimension coordinate formation of one of described detecting electrode central authorities.

See also Fig. 7 A, carry out the synoptic diagram that the first side single electrode drives in the bipolar electrode drive pattern of the present invention for complying with.Drive signal S and be provided for drive electrode near capacitive touch screen the first side, and when driving near the driven signal S of the drive electrode of capacitive touch screen the first side, produce the first side one dimension sensitive information 721 that single electrode drives.See also again Fig. 7 B, carry out the synoptic diagram that the second side single electrode drives in the bipolar electrode drive pattern of the present invention for complying with.Drive signal S and be provided for drive electrode near capacitive touch screen the second side, and when driving near the driven signal S of the drive electrode of capacitive touch screen the second side, produce the second side one dimension sensitive information 722 that single electrode drives.The dimension sensitive information 721 and 722 that the single electrode that produces when the drive electrode of the first side and the second side is driven drives is placed in respectively the first side and the second side that inside contract image 61 and extends out image 71 with formation outward.Extend out the quantity of value (or pixel) of image 71 greater than the quantity of the value (or pixel) of complete image 51.In one example of the present invention, be to produce first the first side one dimension sensitive information 721 that single electrode drives, produce again and inside contract image 61, produce again the second side one dimension sensitive information 722 that single electrode drives, extend out image 71 to consist of one.In another example of the present invention, be to produce first to inside contract image 61, produce respectively again the first side and the second side one dimension sensitive information 721 and 722 that single electrode drives, extend out image 71 to consist of one.

In other words, extending out image is that the first side one dimension sensitive information that is sequentially driven by single electrode, the second side one dimension sensitive information that inside contracts image and single electrode driving consist of.Because being bipolar electrode, the value that inside contracts image 61 drives, so the mean size of the value of mean size first side that can drive greater than single electrode and the second side one dimension image.In example of the present invention, the value of the first side and the second side one dimension sensitive information 721 and 722 is just to place respectively outside the first side and the second side that inside contracts image 61 after amplifying through ratio.Described ratio can be preset multiple, and this preset multiple is greater than 1, also can be the ratio generation between the value of the dimension sensitive information that drives of value and the single electrode of the dimension sensitive information that drives according to bipolar electrode.For example be all values summation (or average) of a dimension sensitive information 721 of the first side and the ratio of a dimension sensitive information 62 all values summations that inside contract adjacent the first side in the image (or average), the value of the first side one dimension sensitive information 721 is just to place outside the first side that inside contracts image 61 after amplifying through this ratio.In like manner, be all values summation (or average) of a dimension sensitive information 722 of the second side and the ratio of a dimension sensitive information 62 all values summations that inside contract adjacent the second side in the image (or average), the value of the second side one dimension sensitive information 722 is just to place outside the second side that inside contracts image 61 after amplifying through this ratio.Again for example, aforesaid ratio can be all values summation that inside contracts image 61 (or average) and the ratio of the first side with a dimension sensitive information 721 of the second side and 722 all values summation (or on average).

In the single electrode drive pattern, each value (or pixel) of complete image is corresponding to the two-dimensions position (or coordinate) that is stacked the place, consisted of by being stacked in corresponding first dimension position (or coordinate) of the drive electrode that is stacked the place and corresponding second the dimension position (or coordinate) of detecting electrode, such as (first dimension position, second dimension position) or (second dimension position, first dimension position).Single external conductive object may with one or more overlapping places capacitive couplings, capacitively coupled overlapping place can produce capacitively coupled variation with the external conductive object, reaction is namely reacted externally conductive object corresponding on the corresponding value in the complete image in complete image on the corresponding value.Therefore according to the external conductive object corresponding to corresponding value and two-dimensions coordinate in the complete image, can calculate the centroid position (two-dimensions coordinate) of external conductive object.

According to example of the present invention, in the single electrode drive pattern, the corresponding dimension position of each electrode (drive electrode and detecting electrode) is the position of electrode central authorities.According to another example of the present invention, in the bipolar electrode drive pattern, the corresponding dimension position of every a pair of electrode (drive electrode and detecting electrode) is the position of central authorities between two electrodes.

In inside contracting image, first dimension sensitive information is corresponding to the middle position of first pair of drive electrode, i.e. first dimension position of central authorities between article one and second drive electrode (first pair of drive electrode).If merely calculate centroid position, then can only calculate first pair of drive electrode central authorities with last to the position between drive electrode central authorities, lack the scope between first pair of drive electrode middle position (first central dimension positions) and article one drive electrode middle position and last is to the scope between drive electrode middle position and the last item drive electrode middle position according to the scope that inside contracts the position that eiconometer calculates.

With respect to inside contracting image, extend out in the image, the first side and the second side one dimension sensitive information be respectively corresponding to the position of article one and the last item drive electrode central authorities, therefore according to the scope that extends out the position that eiconometer calculates than having increased the scope between first pair of drive electrode middle position (first dimension positions of central authorities) and article one drive electrode middle position according to the scope that inside contracts the position that eiconometer calculates and last is to the scope between drive electrode middle position and the last item drive electrode middle position.In other words, the scope that has comprised the position that calculates according to complete image according to the scope that extends out the position that eiconometer calculates.

In like manner, aforesaid bipolar electrode drive pattern more can enlarge becomes the multi-electrode drive pattern, namely drives simultaneously many drive electrodes.In other words, driving signal is many (owning) drive electrodes that offer simultaneously in one group of drive electrode, and for example the drive electrode quantity of one group of drive electrode has two, three or four.Described multi-electrode drive pattern comprises aforesaid bipolar electrode drive pattern, does not comprise aforesaid single electrode drive pattern.

See also Fig. 8, be the method for detecting according to a kind of detecting capacitance type touch-screen of the present invention.Shown in step 810, provide to have many drive electrodes and many capacitive touch screens of detecting electrodes that sequentially are arranged in parallel, wherein said drive electrode and described detecting electrode overlap on a plurality of overlapping places.For example aforesaid drive electrode 151 and detecting electrode 152.Next, shown in step 820, provide the driving signal to one of described drive electrode and one of described drive electrode group drive electrode at single electrode drive pattern and multi-electrode drive pattern respectively.Namely, this driving signal is only to offer one of described drive electrode at every turn when the one pole drive pattern, and this driving signal is the one group of drive electrode that at every turn is provided simultaneously described drive electrode when the multi-electrode drive pattern, wherein except last N bar drive electrode, each drive electrode with form simultaneously driven one group of drive electrode at rear two adjacent drive electrodes, and N is that the drive electrode quantity of one group of drive electrode subtracts one.It can be to be provided by aforesaid driving circuit 41 that providing of signal is provided.Again next, shown in step 830, when each this driving signal is provided, obtain a dimension sensitive information by described detecting electrode, with a dimension sensitive information of obtaining a plurality of multi-electrodes drivings at the multi-electrode drive pattern and a dimension sensitive information of obtaining the first side and the driving of the second side single electrode at the single electrode drive pattern.For example, when the multi-electrode drive pattern, when being provided the driving signal, each group drive electrode obtains respectively the dimension sensitive information that multi-electrode drives.Again for example, when the single electrode drive pattern, provide a dimension sensitive information of obtaining respectively a dimension sensitive information that the first side single electrode drives and the driving of the second side single electrode when driving signal at article one drive electrode and the last item drive electrode.Obtaining of one dimension sensitive information can be to be obtained by above-mentioned circuit for detecting 42.A described dimension sensitive information comprises a dimension sensitive information (inside contracting image) of described multi-electrode driving and a dimension sensitive information of the first side and the driving of the second side single electrode.Again next, shown in step 840, the dimension sensitive information that the dimension sensitive information that a dimension sensitive information that sequentially drives according to the first side single electrode, all multi-electrodes drive and the second side single electrode drive produces image (extending out image).Step 840 can be to be finished by aforementioned control circuit.

As discussed previously, it is not necessarily identical with the current potential that drives signal in the multi-electrode drive pattern to drive the current potential of signal in the single electrode drive pattern, can be identical, also can be different.For example the single electrode driving is to drive with the first larger ac potential, and with respect to the second ac potential that multi-electrode drives, the ratio of the first ac potential and the second ac potential is a preset ratio.In addition, step 840 is that all values of a dimension sensitive information of foundation the first side and the driving of the second side single electrode is to be multiplied by respectively an identical or different pre-set ratio to produce this image.In addition, the frequency of driving signal is different from the frequency that drives signal in the multi-electrode drive pattern in the single electrode drive pattern.

The drive electrode quantity of one group of drive electrode can have two, three, even more, and the present invention is not limited.In better model of the present invention, the drive electrode quantity of one group of drive electrode is two.When the drive electrode quantity of one group of drive electrode is two, each drive electrode is respectively corresponding to the first dimension coordinate, wherein a dimension sensitive information of each many (two) electrode drive is respectively corresponding to first dimension coordinates of central authorities between a pair of drive electrode of described drive electrode, and a dimension sensitive information of the first side and the second side single electrode driving is respectively corresponding to first dimension coordinate of article one and the last item drive electrode.

In like manner, when the drive electrode quantity of one group of drive electrode is many (two), each drive electrode is respectively corresponding to the first dimension coordinate, wherein the dimension sensitive information that drives of each multi-electrode respectively corresponding in one group of drive electrode of described drive electrode at a distance of first dimension coordinates of central authorities between two drive electrodes farthest, and a dimension sensitive information of the first side and the driving of the second side single electrode is respectively corresponding to first dimension coordinate of article one and the last item drive electrode.

In addition, each detecting electrode is respectively corresponding to second dimension coordinate, and each value of each dimension sensitive information is respectively corresponding to second dimension coordinate of one of described detecting electrode.

See also Fig. 9 A and Fig. 9 B, receive the synoptic diagram of capacitive couplings signal for the detecting bus via the driving bus.Owing to some load circuits of signal process, such as the process capacitive couplings, the signal that the detecting bus the is received signal front with offering the driving bus can produce phase differential.For example, when the driving signal offers article one driving bus, article one, the signal of the detecting bus receipts signal front with offering the driving bus can produce first-phase potential difference ψ 1, shown in Fig. 9 A, and when the driving signal offers second driving bus, article one, the signal of the detecting bus receipts signal front with offering the driving bus can produce second-phase potential difference ψ 2, shown in Fig. 9 B.

First-phase potential difference ψ 1 and second-phase potential difference ψ 2 can be along with driving the different and difference to some extent of resistor capacitor circuit (RC circuit) that signal passes through.When the cycle that drives signal was all identical, different phase differential represented that the different time of signal delay is received, if ignore the direct measurement signal of aforesaid phase differential, the beginning phase place that can cause measuring signal is different and produce Different Results.For example, suppose that phase differential is at 0 o'clock, and signal is the string ripple, and amplitude is A.When in phase place being 30 degree, 90 degree, 150 degree, 210 degree, 270 degree when surveying signal with 330 tolerance, can obtain respectively | 1/2A|, | A|, | 1/2A|, |-1/2A|, |-A| and | the signal of-1/2A|.But when phase differential is 150 when spending, the phase place that begins to measure causes a deviation, to become in phase place be 180 degree, 240 degree, 300 degree, 360 degree, 420 degree when surveying signal with 480 tolerance, can obtain respectively 0,

0,

With

Signal.

In previous example, can find out the delay of opening the beginning phase place of the measurement that causes because of aforementioned phase differential, meeting is so that the result of measuring signal is fully different, and no matter driving signal is string ripple or square wave (such as PWM), all can have similar difference to exist.

In addition, when driving signal at every turn and being provided, can provide to many adjacent driving buss, wherein driving bus is sequentially to be arranged in parallel.Provided to two adjacent driving buss by in the preferable example of inventing, therefore in single pass, the n bar drives bus and is provided altogether the driving signal n-1 time, offer one group at every turn and drive bus, for example, offer for the first time article one and second and drive bus, offer second and the 3rd driving bus for the second time, the rest may be inferred.As discussed previously, when driving signal at every turn and being provided, be provided one group drives bus can be one, two or more, and the present invention does not limit the quantity of the driving bus that each driving signal provides.When each driving signal was provided, signals that all detecting buss measure can assemble a dimension sensitive information, and all the dimension sensitive informations in the set single pass can consist of a two-dimensions sensitive information, can be considered image.

Accordingly, in the first embodiment of optimal mode of the present invention, be to adopt different phase differential to postpone detection signal for different buss.For example, determine first a plurality of phase differential, respectively when each group driving bus is provided the driving signal, come measurement signal according to each phase differential, measurement to signal in the phase differential of the maximum institute foundation be that convergence offers the phase differential between the signal that drives before the bus and the signal of detecting after bus is received, be called in the following description convergence phase differential.The measurement of signal can be to select one of described detecting bus to measure according to each phase differential, or select many or all detect bus and measure according to each aberration, judge convergence phase differential according to many or the signal summation of all detecting bus.According to above-mentioned, can judge the convergence phase differential of each group bus, in other words, be provided when driving signal at each group bus, all detecting buss just measure after postponing to be provided the convergence phase differential that drives signal.

In addition, also can be not need to come measurement signal according to all aberrations, can be in described (a plurality of) phase differential, sequentially to come measurement signal according to a phase differential, until the signal that find to measure stops when successively decreasing after increasing progressively, the phase differential of the maximum institute foundation is convergence phase differential in the signal that wherein measures.So, can obtain the larger image of signal.

In addition, also can be to select first a group of described driving bus as the benchmark bus, other bus is called non-benchmark bus, detect first the convergence phase differential of benchmark bus, as flat accurate (level) phase differential, detect again the phase differential that non-benchmark drives the flat accurate phase differential of convergence of bus, be called the most flat accurate phase differential.For example, the signal that measures with the flat accurate phase differential of benchmark bus is as flat calibration signal, respectively each is organized each phase differential that non-benchmark drives bus and carries out the measurement of signal, with in the signal that measures near the phase differential of the flat calibration signal person institute foundation flat accurate phase differential as the driving bus that is provided the driving signal.So, can judge the flat accurate phase differential that each group drives bus, the flat accurate phase differential that drives bus according to each group postpones the measurement of rear signal, can be put down accurate image, and namely the difference between the signal in the image is very little.In addition, flat calibration signal can be to fall within default working range, and not necessarily needing is best meeting peak signal.

In the above stated specification, when each driving signal is provided, to adopt same phase poor with all detecting buss, the technician that the art has common knowledge can know by inference, also can be each when driving signal and being provided, each group detecting bus adopts convergence phase differential or the flat accurate phase differential that adopts respectively separately.In other words, be when driving signal and being provided, respectively each phase differential of each group detecting bus to be carried out the measurement of signal each, to judge convergence phase differential or flat accurate phase differential.

In fact, coming delayed measurement to obtain more greatly or to put down the accurate image except utilizing aberration, also can be to obtain flat accurate image with different enlargement ratios, impedance, measurement time.

Accordingly, the present invention proposes the measuring signal method of touch-screen, as shown in figure 10.Shown in step 1010, touch-screen is provided, touch-screen comprises many buss that many driving buss that are arranged in parallel and many detecting buss that are arranged in parallel form, described driving bus and described detecting bus overlap on a plurality of crossover regions.In addition, shown in step 1020, determine that the phase retardation of each bar or each group driving bus is poor.Afterwards, shown in step 1030, sequentially provide to drive to the described driving bus one or one group of signal, be provided the driving bus and described detecting bus generation mutual capacitance coupling that drive signal.Next, shown in step 1040, when driving signal and being provided, the signal that is provided each the detecting combination that drives signal is to postpone just to be measured behind the corresponding phase differential each.

Accordingly, in the measuring signal device of touch-screen of the present invention, aforesaid step 1030 can be to be implemented by aforesaid driving circuit 41.In addition, step 1040 can be to be implemented by aforesaid circuit for detecting 42.

In example of the present invention, it is to select in poor by a plurality of predetermined phases that each bar or each group drives the phase retardation of bus poor, as selects aforesaid convergence phase differential.Each group bus refers to and be provided simultaneously one group of many bus that drives signal when driving for many, for example selects circuit 141 to implement by the driving of aforesaid driving circuit 41.For example, sequentially select one of described driving bus or one group of bus as selected bus, as being implemented by driving circuit 41.Next, the phase retardation of picking out selected bus in poor by a plurality of predetermined phases is poor.Wherein, when driving signal and be provided for selected bus, the signal that postpones the poor rear measurement of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor.For example, be to be implemented by aforesaid circuit for detecting 42, the poor storage circuit 43 that is stored in of the phase retardation that detects.

In addition, also select aforesaid flat accurate phase differential.For example, select one of described driving bus or one group of bus as the benchmark bus, other or other group bus is as non-benchmark bus, as being implemented by driving circuit 41.Afterwards, the phase retardation of picking out the benchmark bus in poor by a plurality of predetermined phases is poor, and wherein when driving signal and be provided for the benchmark bus, the signal that postpones the poor rear detecting of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor.Wherein, the phase retardation of benchmark bus is poor is aforesaid flat accurate phase differential.Next, postpone the signal of the poor rear detecting of described phase retardation as reference signal with the benchmark bus, sequentially select again one of described non-benchmark bus or one group of non-benchmark bus as selected bus, and the phase retardation of picking out selected bus in poor by a plurality of predetermined phases is poor, the most flat accurate phase differential as the aforementioned, wherein when driving signal and be provided for selected bus, the signal that postpones the poor rear detecting of described phase retardation is compared to postponing signal that other predetermined phase detects after poor close to reference signal.More than, can be to be implemented by circuit for detecting 42.

In example of the present invention, when driving signal and being provided for benchmark bus or selected bus, are the signals that measured by one of described detecting bus by the signal of many measurements in the described detecting bus.In other words, be that to pick out phase retardation according to the signal of phase same detecting bus poor.In another example of the present invention, when driving signal and being provided for benchmark bus or selected bus, are summations of the signal that measures of at least two detecting buss by described detecting bus by the signal of many measurements in the described detecting bus.In other words, be that to pick out phase retardation according to the summation of the signal of identical many detecting buss or whole detecting bus poor.

As discussed previously, can be that each bar or each are organized on the driven bus with the overlapping crossover region of each bar detecting bus and had corresponding phase retardation poor.In the following description, be to drive bus and overlapping each bar of difference or each group detecting bus as the detecting combination with each bar or each group.In other words, driving signal can be to offer simultaneously one or more to drive bus, and signal also can be to be measured by one or more detecting bus.When producing signal through measuring, drive the signal one or more driving bus that is provided and the one or more detecting bus that is measured and be called the detecting combination.For example when wall scroll driving or many drivings, with a bus measurement signal value, or with two buss measurement differences, measure a pair of differences again or with three buss.Wherein difference is signal poor of adjacent two buss, and two difference is in three adjacent conductive bars, and the difference of the signal of front two buss is subtracted each other poor produce poor of the signal of rear two buss.

Accordingly, in another example of the present invention, be a kind of measuring signal method of touch-screen, as shown in figure 11.Shown in step 1110, touch-screen is provided, touch-screen comprises many buss that many driving buss that are arranged in parallel and many detecting buss that are arranged in parallel form, described driving bus and described detecting bus overlap on a plurality of crossover regions.In addition, shown in step 1120, drive bus and overlapping each bar of difference or each group detecting bus as the detecting combination with each bar or each group, and shown in step 1130, determine that each phase retardation of detecting combination is poor.Afterwards, shown in step 1140, sequentially provide to drive to the described driving bus one or one group of signal, be provided and be provided the driving bus that drives signal and overlapping detecting bus generation mutual capacitance coupling in the detecting combination that drives signal.Next, shown in step 1150, when driving signal and being provided, the signal that is provided each the detecting combination that drives signal is to postpone just to be measured behind the corresponding phase differential each.

Accordingly, in a kind of measuring signal device of the present invention, step 1140 can be to be implemented by aforesaid driving circuit 41, and step 1150 can be to be implemented by aforesaid circuit for detecting 42.

In example of the present invention, step 1130 can be to comprise: sequentially selecting one of described detecting combination as selected detecting combination, can be to be implemented by aforesaid driving circuit 41; And the phase retardation of picking out selected detecting combination in poor by a plurality of predetermined phases is poor, wherein when the driving signal is provided for selected detecting combination, the signal that postpones the poor rear measurement of described phase retardation can be to be implemented by aforesaid circuit for detecting 42 greater than the signal that postpones other predetermined phase and detect after poor.

In another example of the present invention, determine that each detects the phase retardation that makes up poor can also be to implement as described below.Select one of described detecting combination as benchmark detecting combination, other detecting is made up as non-benchmark detecting combination, and sequentially selects one of described non-benchmark detecting combination and make up as selected detecting, can be to be implemented by aforementioned driving circuit 41.In addition, the phase retardation of picking out benchmark detecting combination in poor by a plurality of predetermined phases is poor, wherein when the driving signal is provided for benchmark detecting combination, the signal that postpones the poor rear detecting of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor, and with the signal of the poor rear detecting of the benchmark detecting described phase retardation of combinatorial delays as reference signal.In addition, the phase retardation of picking out selected detecting combination in poor by a plurality of predetermined phases is poor, wherein when driving signal and be provided for selected detecting combination, the signal that postpones the poor rear detecting of described phase retardation is compared to postponing signal that other predetermined phase detects after poor close to reference signal.More than, can be to be implemented by aforesaid circuit for detecting 42.

In the second embodiment of the present invention, signal is to be measured by control circuit, and the signal of each group detecting bus is to measure through behind the variable resistor respectively again, and control circuit is to drive bus according to each group to determine variable-resistance impedance.For example, select first one group of described driving bus as the benchmark bus, other bus is called non-benchmark bus.At first set a plurality of default impedances, and be provided the signal of a detecting bus of detecting when driving signal at benchmark bus (may be one or more), or detect many or all detect the totalling of the signal of bus, as flat calibration signal.In addition, flat calibration signal can be to fall within default working range, and not necessarily needing is the best or peak signal.In other words, any default impedance that makes flat calibration signal fall within default working range can be as the flat accurate impedance of benchmark bus.Next when each is organized non-benchmark bus and is provided drive signal value, adjust variable resistor according to each default impedance respectively, and detect the signal of this detecting bus, or detect these many or all detect the totalling of the signal of bus, comparing the default impedance near flat calibration signal, as organizing the flat accurate impedance of non-benchmark bus with respect to being provided this that drive signal.So, can judge the flat accurate impedance that each group drives bus, variable-resistance impedance (adjusting variable resistor to flat accurate impedance) is adjusted in the flat accurate impedance that drives bus according to each group, can be put down accurate image, and namely the difference between the signal in the image is very little.

In the above stated specification, when each driving signal is provided, to adopt identical flat accurate impedance with all detecting buss, the technician that the art has common knowledge can know by inference, also can be when each driving signal is provided, each group detecting bus adopts the flat accurate impedance of adopting respectively separately.In other words, when each driving signal is provided, respectively the measurement of signal is carried out in each default impedance of each group detecting bus, to judge the prediction impedance of the flat calibration signal of convergence, obtain respectively accordingly each group and drive the flat accurate impedance that bus is provided each bar detecting bus when driving signal, to adjust respectively the variable-resistance impedance of each bar detecting bus of electrical couplings.

Aforesaid control circuit also is comprised of one or many IC except can being made of electronic component.In example of the present invention, variable resistor can be to build in IC, can (such as the firmware in the IC, firmware) control variable-resistance impedance by program able to programme.For example variable resistor is to be made of a plurality of resistance, and by a plurality of switch controls, adjusts variable-resistance impedance by opening with closing (on and off) of different switches, because variable resistor and program able to programme are known technology, no longer narrates at this.Variable resistor in the IC can reduce cost effectively with the program control contact panel that can be applicable to via the mode of a piece of wood serving as a brake to halt a carriage body correction different qualities able to programme, reaches the purpose of commercial production.

In the third embodiment of the present invention, signal is to be measured by control circuit, the signal of each group detecting bus is to pass through respectively measurement circuit (such as integrator) to measure, and control circuit is to drive the enlargement ratio that bus determines measurement circuit according to each group.For example, select first one group of described driving bus as the benchmark bus, other bus is called non-benchmark bus.At first set a plurality of default enlargement ratios, and be provided the signal of a detecting bus of detecting when driving signal at benchmark bus (may be one or more), or detect many or all detect the totalling of the signal of bus, as flat calibration signal.In addition, flat calibration signal can be to fall within default working range, and not necessarily needing is the best or peak signal.In other words, any default enlargement ratio that makes flat calibration signal fall within default working range can be as the flat accurate enlargement ratio of benchmark bus.Next when each is organized non-benchmark bus and is provided drive signal value, respectively according to each default enlargement ratio adjustment amount slowdown monitoring circuit, and detect the signal of this detecting bus, or detect these many or all detect the totalling of the signal of bus, comparing the default enlargement ratio near flat calibration signal, as organizing the flat accurate enlargement ratio of non-benchmark bus with respect to being provided this that drive signal.So, can judge the flat accurate enlargement ratio that each group drives bus, organize the enlargement ratio that the flat accurate enlargement ratio that drives bus comes the adjustment amount slowdown monitoring circuit according to each, can be put down accurate image, namely the difference between the signal in the image is very little.

In the above stated specification, when each driving signal is provided, to adopt identical flat accurate enlargement ratio with all detecting buss, the technician that the art has common knowledge can know by inference, also can be when each driving signal is provided, each group detecting bus adopts the flat accurate enlargement ratio that adopts respectively separately.In other words, when each driving signal is provided, respectively the measurement of signal is carried out in each default enlargement ratio of each group detecting bus, to judge the scale-up multiplying power of the flat calibration signal of convergence, obtain respectively accordingly each group and drive the flat accurate enlargement ratio that bus is provided each bar detecting bus when driving signal.

In the fourth embodiment of the present invention, signal is to be measured by control circuit, the signal of each group detecting bus is to pass through respectively measurement circuit (such as integrator) to measure, and control circuit is to drive the measurement time that bus determines measurement circuit according to each group.For example, select first one group of described driving bus as the benchmark bus, other bus is called non-benchmark bus.At first set a plurality of default measurement times, and be provided the signal of a detecting bus of detecting when driving signal at benchmark bus (may be one or more), or detect many or all detect the totalling of the signal of bus, as flat calibration signal.In addition, flat calibration signal can be to fall within default working range, and not necessarily needing is the best or peak signal.In other words, any default measurement time that makes flat calibration signal fall within default working range can be as the flat accurate measurement time of benchmark bus.Next when each is organized non-benchmark bus and is provided drive signal value, respectively according to each default measurement time adjustment amount slowdown monitoring circuit, and detect the signal of this detecting bus, or detect these many or all detect the totalling of the signal of bus, comparing the default measurement time near flat calibration signal, as organizing the flat accurate measurement time of non-benchmark bus with respect to being provided this that drive signal.So, can judge the flat accurate measurement time that each group drives bus, according to each measurement time of organizing the flat accurate measurement time adjustment amount slowdown monitoring circuit that drives bus, can be put down accurate image, namely the difference between the signal in the image is very little.

In the above stated specification, when each driving signal is provided, to adopt the identical flat accurate measurement time with all detecting buss, the technician that the art has common knowledge can know by inference, also can be when each driving signal is provided, each group detecting bus adopts the flat accurate measurement time of adopting respectively separately.In other words, when each driving signal is provided, respectively each default measurement time of each group detecting bus is carried out the measurement of signal, measure the time with the prediction of judging the flat calibration signal of convergence, obtain respectively accordingly each group and drive the flat accurate measurement time that bus is provided each bar detecting bus when driving signal.

In above stated specification, can select a kind of with the 4th embodiment or select the multiple enforcement that mixes by the first embodiment, the second embodiment, the 3rd embodiment, the present invention is not limited.In addition, when measuring flat calibration signal, can be to select apart from measurement circuit one or more detecting bus farthest to carry out the detecting of signal, to produce flat calibration signal.For example, can be that signal with farthest a detecting bus produces flat calibration signal, or the differential wave of two detecting buss produces flat calibration signal (difference) farthest, also can be farthest in three detecting buss front two differences with the differential wave of rear two detecting buss produce flat calibration signal (two difference).In other words, flat calibration signal can be signal value, difference or two difference, also can be other value that produces according to the signal of one or more detecting bus.

The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.

Claims

1. the measuring signal method of a touch-screen is characterized in that comprising:

Touch-screen is provided, and touch-screen comprises many buss that many driving buss that are arranged in parallel and many detecting buss that are arranged in parallel form, and described driving bus and described detecting bus overlap on a plurality of crossover regions;

The phase retardation that determines each bar or each group driving bus is poor;

Sequentially provide to drive to the described driving bus one or one group of signal, be provided the driving bus and described detecting bus generation mutual capacitance coupling that drive signal; And

When each driving signal is provided, postpone corresponding at least one detecting bus measurement signal of the poor rear ability of phase retardation that is provided one or the one group driving bus that drives signal by described detecting bus.

2. measuring signal method as claimed in claim 1 is characterized in that determining that each bar or each group drive poor the comprising of phase retardation of bus:

Sequentially select one of described driving bus or one group of bus as selected bus; And

The phase retardation of picking out selected bus in poor by a plurality of predetermined phases is poor, and wherein when driving signal and be provided for selected bus, the signal that postpones the poor rear measurement of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor.

3. measuring signal method as claimed in claim 2 when it is characterized in that driving signal and being provided for selected bus, is summations of the signal that measured by one of described detecting bus by the signal of many measurements in the described detecting bus.

4. measuring signal method as claimed in claim 2, when it is characterized in that driving signal and being provided for selected bus, are summations of the signal that measures of at least two detecting buss by described detecting bus by the signal of many measurements in the described detecting bus.

5. measuring signal method as claimed in claim 1 is characterized in that determining that each bar or each group drive poor the comprising of phase retardation of bus:

Select one of described driving bus or one group of bus as the benchmark bus, other or other group bus is as non-benchmark bus;

The phase retardation of picking out the benchmark bus in poor by a plurality of predetermined phases is poor, and wherein when driving signal and be provided for the benchmark bus, the signal that postpones the poor rear detecting of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor;

Postpone the signal of the poor rear detecting of described phase retardation as reference signal with the benchmark bus;

Sequentially select one of described non-benchmark bus or one group of non-benchmark bus as selected bus; And

The phase retardation of picking out selected bus in poor by a plurality of predetermined phases is poor, wherein when driving signal and be provided for selected bus, the signal that postpones the poor rear detecting of described phase retardation is compared to postponing signal that other predetermined phase detects after poor close to reference signal.

6. measuring signal method as claimed in claim 5 when it is characterized in that driving signal and being provided for benchmark bus or selected bus, is the signals that measured by one of described detecting bus by the signal of many measurements in the described detecting bus.

7. measuring signal method as claimed in claim 5, when it is characterized in that driving signal and being provided for benchmark bus or selected bus, are summations of the signal that measures of at least two detecting buss by described detecting bus by the signal of many measurements in the described detecting bus.

8. the measuring signal method of a touch-screen is characterized in that comprising:

Drive bus and overlapping each bar of difference or each group detecting bus as the detecting combination with each bar or each group;

The phase retardation that determines each detecting combination is poor;

Sequentially provide to drive to the described driving bus one or one group of signal, be provided and be provided the driving bus that drives signal and overlapping detecting bus generation mutual capacitance coupling in the detecting combination that drives signal; And

When driving signal and being provided, the signal that is provided each the detecting combination that drives signal is to postpone just to be measured behind the corresponding phase differential each.

9. measuring signal method as claimed in claim 8 is characterized in that determining poor comprising of phase retardation of each detecting combination:

Sequentially select one of described detecting combination as selected detecting combination; And

The phase retardation of picking out selected detecting combination in poor by a plurality of predetermined phases is poor, wherein when driving signal and be provided for selected detecting combination, the signal that postpones the poor rear measurement of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor.

10. measuring signal method as claimed in claim 8 is characterized in that determining poor comprising of phase retardation of each detecting combination:

Select one of described detecting combination as benchmark detecting combination, other detecting combination is as non-benchmark detecting combination;

The phase retardation of picking out benchmark detecting combination in poor by a plurality of predetermined phases is poor, and wherein when driving signal and be provided for benchmark detecting combination, the signal that postpones the poor rear detecting of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor;

Detect the signal of the poor rear detecting of the described phase retardation of combinatorial delays as reference signal with benchmark;

Sequentially select one of described non-benchmark detecting combination as selected detecting combination; And

The phase retardation of picking out selected detecting combination in poor by a plurality of predetermined phases is poor, wherein when driving signal and be provided for selected detecting combination, the signal that postpones the poor rear detecting of described phase retardation is compared to postponing signal that other predetermined phase detects after poor close to reference signal.

11. the measuring signal device of a touch-screen is characterized in that comprising:

Touch-screen comprises many buss that many driving buss that are arranged in parallel and many detecting buss that are arranged in parallel form, and described driving bus and described detecting bus overlap on a plurality of crossover regions;

Driving circuit, sequentially provide and drive to the described driving bus one or one group of signal, be provided the driving bus and the described detecting bus that drive signal and produce the mutual capacitance coupling, it is poor that wherein each bar or each group drive the corresponding phase retardation of bus; And

Circuit for detecting, it is poor and each when driving signal and being provided to determine that each bar or each group drives the phase retardation of bus, postpones to drive the poor rear ability of phase retardation of bus by at least one detecting bus measurement signal of described detecting bus corresponding to being provided or a group of driving signal.

12. measuring signal device as claimed in claim 11, it is characterized in that driving circuit comprises that more of sequentially selecting described driving bus or one group of bus are as the device of selected bus, and circuit for detecting more comprises the poor device of phase retardation of picking out selected bus in poor by a plurality of predetermined phases, wherein when driving signal and be provided for selected bus, the signal that postpones the poor rear measurement of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor.

13. measuring signal device as claimed in claim 12 when it is characterized in that driving signal and being provided for selected bus, is summations of the signal that measured by one of described detecting bus by the signal of many measurements in the described detecting bus.

14. measuring signal device as claimed in claim 12, when it is characterized in that driving signal and being provided for selected bus, are summations of the signal that measures of at least two detecting buss by described detecting bus by the signal of many measurements in the described detecting bus.

15. measuring signal device as claimed in claim 11, it is characterized in that driving circuit selects one of described driving bus or one group of bus as the device of benchmark bus, as non-benchmark bus, and driving circuit is sequentially selected one of described non-benchmark bus or one group of non-benchmark bus as selected bus with other or other group bus; The phase retardation of picking out the benchmark bus during circuit for detecting is poor by a plurality of predetermined phases is poor, wherein when the driving signal is provided for the benchmark bus, the signal that postpones the poor rear detecting of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor, and circuit for detecting is to postpone the signal of the poor rear detecting of described phase retardation as reference signal with the benchmark bus, and the phase retardation of picking out selected bus in poor by a plurality of predetermined phases is poor, wherein when driving signal and be provided for selected bus, the signal that postpones the poor rear detecting of described phase retardation is compared to postponing signal that other predetermined phase detects after poor close to reference signal.

16. measuring signal device as claimed in claim 15, when it is characterized in that driving signal and being provided for benchmark bus or selected bus, are the signals that measured by one of described detecting bus by the signal of many measurements in the described detecting bus.

17. measuring signal device as claimed in claim 15, when it is characterized in that driving signal and being provided for benchmark bus or selected bus, are summations of the signal that measures of at least two detecting buss by described detecting bus by the signal of many measurements in the described detecting bus.

18. the measuring signal device of a touch-screen is characterized in that comprising:

Driving circuit, sequentially provide and drive to the described driving bus one or one group of signal, be provided and be provided the driving bus that drives signal in the detecting combination that drives signal and produce the mutual capacitance coupling with overlapping detecting bus, wherein each bar or each group drive bus and respectively overlapping each bar or each group detecting bus to make up corresponding phase retardation as detecting combination and each detecting poor; And

When driving signal and being provided, the signal that is provided each the detecting combination that drives signal is to postpone just to be measured behind the corresponding phase differential to circuit for detecting each.

19. measuring signal device as claimed in claim 18 is characterized in that driving circuit sequentially selects one of described detecting combination as selected detecting combination; And circuit for detecting to pick out the phase retardation of selected detecting combination in poor by a plurality of predetermined phases poor, wherein when driving signal and be provided for selected detecting combination, the signal that postpones the poor rear measurement of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor.

20. measuring signal device as claimed in claim 18, it is characterized in that driving circuit selects one of described detecting combination as benchmark detecting combination, other detecting combination is as non-benchmark detecting combination, and driving circuit is sequentially selected one of described non-benchmark detecting combination as selected detecting combination; And circuit for detecting to pick out the phase retardation of benchmark detecting combination in poor by a plurality of predetermined phases poor, wherein when the driving signal is provided for benchmark detecting combination, the signal that postpones the poor rear detecting of described phase retardation is greater than the signal that postpones other predetermined phase and detect after poor, and circuit for detecting is to detect the signal of the poor rear detecting of the described phase retardation of combinatorial delays as reference signal with benchmark, and the phase retardation of picking out selected detecting combination in poor by a plurality of predetermined phases is poor, wherein when driving signal and be provided for selected detecting combination, the signal that postpones the poor rear detecting of described phase retardation is compared to postponing signal that other predetermined phase detects after poor close to reference signal.