CN101501619A - Fingertip touch recognition for a digitizer - Google Patents
Fingertip touch recognition for a digitizer Download PDFInfo
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- CN101501619A CN101501619A CNA2007800301596A CN200780030159A CN101501619A CN 101501619 A CN101501619 A CN 101501619A CN A2007800301596 A CNA2007800301596 A CN A2007800301596A CN 200780030159 A CN200780030159 A CN 200780030159A CN 101501619 A CN101501619 A CN 101501619A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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Abstract
A method for verifying a fingertip touch input to a digitizer, the method comprises detecting a pattern of signals obtained from conductive lines of a digitizer sensor, comparing the pattern to a pre-determined fingertip characteristic, and recognizing a fingertip touch input based on the comparison.
Description
Technical field
The present invention relates to Aristogrid (digitizer), more specifically, relate to the Aristogrid responsive Fingertip touch (fingertip touch).
Background technology
Touching technique is used as the input media of various products usually.Owing to emerge in large numbers the use sharp increase of various types of touching devices such as new mobile device such as PDA(Personal Digital Assistant), dull and stereotyped PC and wireless flat-panel monitor (FPD) screen display.These new equipments are free of attachment to QWERTY keyboard, mouse or similar input media usually, and these input medias are considered to limit their movability.On the contrary, there is the trend of using one or another kind of touch input technology.Contact pilotage and/or finger tip can be used for user interactions.
All transfer the U.S. Patent number 6 that is entitled as ＂ Physical Object LocationApparatus and Method and a Platform using the same ＂ of N-trig company, 690,156 and the U.S. Patent Publication numbers 20040095333 that is entitled as ＂ Transparent Digitizer ＂ a kind of being used at the electromagnetic method of location physical object on the FPD and a kind of transparent Aristogrid that can merge to electronic installation usually on (active) display screen initiatively described, the content of these two patents is incorporated herein for your guidance.The Aristogrid sensor comprises the matrix of vertical and horizontal wire and sensor with sensing electric signals.The physical object that is positioned at the specific location on the Aristogrid has excited the signal that can detect its start position (position of origin).
The U.S. Patent Application Publication No. 20040155871 that is entitled as ＂ Touch Detection for a Digitizer ＂ that transfers N-trig company has been described a kind of digitizer tablet system that can use identical sensing lead to detect the position of physical object and Fingertip touch, and this patent is incorporated herein for your guidance.Usually, this system comprises the clear sensor that covers on the FPD.The sensor of Aristogrid comprises the matrix of vertical and horizontal wire, with sensing electric signals.Touch Aristogrid at ad-hoc location and excited the signal that can detect its start position.
The U.S. Patent Application Publication No. 20060012580 that is entitled as ＂ Automatic switching for a dual modedigitizer ＂ that transfers N-Trig has been described a kind of method of utilizing dissimilar user interactions (as electromagnetism contact pilotage and touch) in digitizer systems, and the content of this patent is incorporated herein for your guidance.Described a kind of size and carried out " (palm rejection) taken precautions against in the palm false touch ", thereby distinguished the method for local touch event and wide area touch event based on the touch area of being detected.
Summary of the invention
It is that finger tip touches the system and method for (for example user plan to carry out the touch that user interactions carries out) that the one side of some embodiments of the present invention provides a kind of signal input that is used to verify Aristogrid.The signal input of verifying Aristogrid is other detection signal that finger tip touches to be provided on input of differentiation Fingertip touch and the Aristogrid, for example the machinery that causes between Aristogrid and LCD changes because hand rests on the Aristogrid, and the user does not plan to carry out user interactions and carries out.According to some embodiments of the present invention, by being identified in one or more predetermined patterns of the signal that receives on the Aristogrid grid, the signal input that promotes the checking Aristogrid is that finger tip touches.Described and be used in example embodiment of the present invention verify that the signal input of Aristogrid is the pattern that finger tip touches.
According to some embodiments of the present invention, be used to verify the prearranged signals pattern of Fingertip touch be included in the wire array of Aristogrid grid (as 4 wire array) go up detect and/or with as described in the signal amplitude pattern that detects in the output of the related differential amplifier array (as the array of 4 differential amplifiers) of lead.In some example embodiment, predetermined pattern is the pattern structure exported according to the signal amplitude on the vertical and horizontal wire of Aristogrid grid.In some example embodiment, predetermined pattern is to construct according to the signal amplitude on one or more predefine threshold values.In example embodiment more of the present invention, determine on the Aristogrid grid to detect the zone of input signal, and be the finger tip touch the signal input that itself and prearranged signals pattern identification one are used from the checking Aristogrid.In example embodiment more of the present invention, determine to detect the yardstick (dimension) of input signal, and be the finger tip touch the signal input that itself and prearranged signals pattern identification one are used from the checking Aristogrid.
According to some embodiments of the present invention, the prearranged signals pattern that is used to verify Fingertip touch comprises the pattern of spatial gradient of the output of signal amplitude gradient (as the spatial gradient that detects) and/or differential amplifier on the wire array of Aristogrid grid.In some example embodiment, predetermined pattern is according to the pattern structure of the signal amplitude gradient on the vertical and horizontal wire of Aristogrid grid.In some example embodiment, predetermined pattern is to construct according to the signal amplitude gradient on one or more predefine threshold values.
In example embodiment more of the present invention, determine on the Aristogrid grid to detect the zone of input signal, and be the finger tip touch the signal input that itself and prearranged signals pattern identification one are used from the checking Aristogrid.In example embodiment more of the present invention, determine to detect the yardstick of input signal, and be the finger tip touch the signal input that itself and prearranged signals pattern identification one are used from the checking Aristogrid.
According to some embodiments of the present invention, the prearranged signals pattern that is used to verify Fingertip touch is included in the signal amplitude that detects on the wire array of Aristogrid grid and the pattern of signal amplitude gradient.In some example embodiment, the prearranged signals pattern that is used to verify Fingertip touch comprises the relation between signal amplitude and the signal amplitude gradient.
According to some embodiments of the present invention, be used to verify that the prearranged signals pattern of Fingertip touch comprises the relation between the pattern on the orthogonal axes of Aristogrid grid (for example transverse axis and Z-axis).In some example embodiment, described pattern is the pattern of signal amplitude.In some example embodiment, described pattern is the pattern of signal amplitude gradient.In example embodiment more of the present invention, described relation is to detect the relation of the dimension of input signal.In example embodiment more of the present invention, determine on the Aristogrid grid to detect the zone of input signal, and be the finger tip touch the signal input that itself and prearranged signals pattern identification one are used from the checking Aristogrid.
An aspect of some embodiments of the invention provides a kind of method that is used to verify the Fingertip touch input of Aristogrid, and described method comprises the pattern of the signal that detection obtains from the lead of Aristogrid sensor; Described pattern is compared with predetermined finger tip feature; And relatively discern Fingertip touch input based on described.
Alternatively, described lead is a parallel wire.
Alternatively, described lead comprises the parallel wire (twoorthogonal sets of parallel conductive lines) of two quadrature groups that form grid.
Alternatively, described two quadrature groups are electrically isolated from one.
Alternatively, described parallel wire equates at interval.
Alternatively, described parallel wire interval 4mm.
Alternatively, many described parallel wire is imported into differential amplifier.
Alternatively, described pattern is the pattern of differential amplifier output.
Alternatively, described many be non-conterminous lead to parallel wire.
Alternatively, described pattern is the pattern of signal amplitude.
Alternatively, described pattern is the pattern of the signal amplitude on the predefine amplitude threshold.
Alternatively, described pattern is the pattern of signal amplitude gradient.
Alternatively, described pattern is the pattern of the signal amplitude gradient on the predefine Grads threshold.
Alternatively, described method comprises the quantity of determining described signal pattern intermediate gap.
Alternatively, described method comprises the maximum quantity that defines the gap, described signal pattern qualified (qualify for) checking Fingertip touch under this maximum quantity.
Alternatively, use the pattern of capacitive touch method detection signal.
Alternatively, the described signal amplitude gradient space high pass filtered signals that is described signal pattern.
Alternatively, described pattern is a contour patterns.
Alternatively, described method comprises the yardstick ratio in the zone of determining the described Aristogrid sensor of detection; And the scope that defines the described ratio of qualified checking Fingertip touch.
Alternatively, described method comprises the zone of determining detection signal on described Aristogrid sensor; And the scope that defines the described zone of qualification testing Fingertip touch.
Alternatively, described Aristogrid sensor is transparent.
Alternatively, described detection comprises the detections that touch more.
An aspect of some embodiments of the invention provides a kind of system that is used to verify the finger tip input of Aristogrid, comprising: the Aristogrid sensor that comprises a plurality of leads; And controller, can operate with the detection based on Fingertip touch input of checking from the pattern of the output of described a plurality of leads.
Alternatively, described a plurality of lead comprises parallel wire.
Alternatively, described a plurality of lead comprises the parallel wire of two quadrature groups that form grid.
Alternatively, described two quadrature groups are electrically isolated from one.
Alternatively, described a plurality of conductor spacing equates.
Alternatively, described a plurality of conductor spacing 4mm.
Alternatively, many described parallel wire is imported into differential amplifier.
Alternatively, described pattern is the pattern of differential amplifier output.
Alternatively, described many be non-conterminous lead to parallel wire.
Alternatively, controller can be operated to determine the pattern of signal amplitude according to described output.
Alternatively, controller can be operated to determine the pattern of signal amplitude according to the output on the predefine amplitude threshold.
Alternatively, controller can be operated to determine the pattern of signal amplitude gradient according to described output.
Alternatively, controller can be operated to determine the pattern of signal amplitude gradient according to the output on the predefine Grads threshold.
Alternatively, controller can be operated to determine the quantity of described signal pattern intermediate gap.
Alternatively, controller can be operated with refusal and the corresponding input signal of pattern with the gap that is higher than predefine maximum quantity gap.
Alternatively, use the capacitive touch method to detect the pattern of output.
Alternatively, the described signal amplitude gradient high pass filtered signals that is described output.
Alternatively, described pattern is a contour patterns.
Alternatively, described controller can be operated the yardstick ratio with zone that determine to detect described output, and determines that described ratio is whether in the predefine ratio ranges of qualified checking Fingertip touch.
Alternatively, described controller can be operated determining described zone whether in the predefine regional extent of qualified checking Fingertip touch, and determines that described yardstick is whether in the predefine range scale of qualified checking Fingertip touch.
Alternatively, described Aristogrid sensor is transparent.
Alternatively, described controller can be operated to detect multi-touch input.
Alternatively, described system comprises principal computer, and wherein said principal computer is communicated by letter with described controller.
Alternatively, the input that will be verified as finger tip input of described controller sends to described principal computer.
Description of drawings
Specifically and the clearly claimed theme of being paid close attention in the instructions ending.Describe the non-limiting example of the embodiment of the invention below with reference to appended accompanying drawing, these accompanying drawings have been listed in the back of this section.In the drawings, same spline structure, element or the part that appears in the more than accompanying drawing has identical mark in institute's drawings attached acceptance of the bid that they occur usually.For convenience and the clear size that presents assembly shown in the selection figure and feature, and needn't show in proportion.For example, for clarity, the some of them size of component may have been amplified with respect to other element.
Fig. 1 is the demonstration simplified block diagram of digitizer systems according to some embodiments of the invention;
Fig. 2 is the demonstration simplified electrical circuit diagram that touch according to some embodiments of the invention detects;
Fig. 3 is the demonstration simplified electrical circuit diagram according to the Aristogrid sensor that comprises differential amplifier of the embodiment of the invention;
Fig. 4 is that according to some embodiments of the invention Aristogrid sensor carries out the schematic illustration that Fingertip touch detects based on the capacitive touch method that is used to detect Fingertip touch;
Fig. 5 A is the schematic illustration of the exemplar signal of the signal amplitude that detect to obtain from Fingertip touch according to some embodiments of the invention;
Fig. 5 B is the schematic illustration of the exemplar signal of the signal amplitude gradient that detect to obtain from Fingertip touch according to some embodiments of the invention;
Fig. 6 describes to be used to verify that according to example embodiment of the present invention input on the Aristogrid is the example flow chart that finger tip touches the method that detects;
Fig. 7 A is the schematic illustration of exemplar signal of the Fingertip touch of example embodiment according to the present invention pattern that range value on the predefine amplitude threshold is shown;
Fig. 7 B is the schematic illustration of exemplar signal of the Fingertip touch of example embodiment according to the present invention pattern that Grad on the predefine Grads threshold is shown;
Fig. 8 A is the schematic illustration that touches the exemplar signal that detects the signal amplitude that obtains according to some embodiments of the present invention from hand;
Fig. 8 B is the schematic illustration that touches the exemplar signal that detects the signal amplitude gradient that obtains according to some embodiments of the present invention from hand;
Fig. 8 C is the schematic illustration that the exemplar signal that the hand of the pattern of the range value on the predefine amplitude threshold touch to detect is shown according to some embodiments of the present invention;
Fig. 8 D is the schematic illustration that the hand of example embodiment according to the present invention pattern that Grad on the predefine Grads threshold is shown touches the exemplar signal that detects;
Fig. 9 describes to be used to verify that according to other example embodiment of the present invention input on the Aristogrid is the example flow chart that finger tip touches the method that detects;
To recognize that also for graphic simple and clear, the element shown in the figure need not be drawn in proportion.In addition, under the situation of thinking fit, these Reference numerals are reusable in each figure, to indicate correspondence or similar elements.
Embodiment
In the following description, non-limiting example embodiment of the present invention in conjunction with various aspects of the present invention has been described.For purpose of explanation, concrete configuration and details have been set forth, so that the complete understanding to embodiment is provided.Yet it is obvious to the skilled person that is not having can to implement the present invention under the situation of detail given herein yet.And, smudgy in order not make the present invention, can omit or simplify well-known feature.Features shown in one embodiment can with in other embodiments shown in feature combine.Clear for what express, no longer repeat this feature.And, some nonessential features have been described in certain embodiments.
With reference now to Fig. 1,, it illustrates the demonstration simplified block diagram of digitizer systems according to some embodiments of the invention.Digitizer systems shown in Fig. 1 is applicable to realize mutual any calculation element between user and device (mobile computing device that for example comprises the FPD screen).The example of this device comprises dull and stereotyped PC, (pen enabled) laptop computer, PDA or any hand-held device that enable, such as palm PC (palm pilot) and mobile phone.According to some embodiments of the present invention, digitizer systems comprises the sensor 12 based on grid, and it is transparent alternatively, and it is coated with FPD 10 usually.ASIC 16 comprises the circuit of output being handled and is sampled into numeral.Digital output signal is forwarded to digital units 20, and for example digital ASIC unit is so that carry out further digital processing.According to some embodiments of the present invention, digital units 20 is with the controller of ASIC unit 16 as digitizer systems, and/or has the functional of controller.In a single day the result determines just to be forwarded to main frame 22 via interface 24, so that handled by operating system or any current application program.According to some embodiments of the present invention, control function is also contained in the main frame 22 or is included in exclusively in the main frame 22.
According to some embodiments of the present invention, sensor 12 is grids of the lead made by the conductive material of patterning on paper tinsel or glass substrate (being chosen as tin indium oxide (ITO)).Described lead and paper tinsel are transparent alternatively.Usually, this grid is made of two-layer, and this is two-layer electrically isolated from one.Usually, wherein one deck contains one group of parallel conductor that equates at interval, and that organizes one group of parallel conductor that equates at interval of quadrature with ground floor and another layer contains.Usually, described parallel conductor is the straight line that equates at interval, and is the input that comprises the ASIC unit 16 of amplifier.Alternatively, amplifier is a differential amplifier.Usually, described parallel conductor is the about distance of 4mm at interval, 2-8mm for example, and this depends on the size of FPD alternatively.
Usually, the ASIC unit signal that is connected to the output of each conductor in the grid and is used for being received in first processing stage processes.As mentioned above, ASIC unit 16 comprises the array of amplifier (as differential amplifier), with the signal of amplification sensor.Additionally, ASIC unit 16 comprises one or more wave filters, to remove irrelevant frequency.Alternatively, before sampling, carry out filtering.By A/D signal is sampled then, carry out filtering by digital filter alternatively, and be forwarded to digital ASIC unit, so that carry out further digital processing.
According to some embodiments of the present invention, digital units 20 reads sampled data, it is handled, and determine position such as the physical object and/or the finger touch of contact pilotage.The position of being calculated sends to principal computer via interface 24.According to some embodiment, digital units 20 produces and manages the trigger pulse that will offer around the drive coil 26 of transducer arrangements and display screen.Drive coil provides trigger pulse, and the passive electric circuit in this trigger pulse excitation contact pilotage is to produce the response that can be detected subsequently from contact pilotage.According to some embodiment, digital units 20 produces and manages the trigger pulse of one of them lead.
Contact pilotage detects
According to some embodiments of the present invention, contact pilotage is a passive element.Alternatively, contact pilotage comprises resonant circuit, and this resonant circuit is triggered by drive coil 26, to vibrate in its resonance frequency.Alternatively, contact pilotage can comprise energy pickup unit and pierce circuit.In resonance frequency, circuit produces vibration, and this vibration finishes the back at driving pulse and continues, and decay stably.Near vibration (induce) voltage of by sensor 12 sensings, inducting in the lead of decay.According to some embodiments of the present invention, close to each other but non-conterminous two parallel pickup wires are connected respectively to the positive and negative input of differential amplifier.Amplifier can generate output signal thus, and this output signal is the amplification of the difference between these two pickup wire signals.The amplifier that has contact pilotage at two pickup wire on one of them will produce than higher amplitude output.
Fingertip touch detects
With reference now to Fig. 2,, it illustrates the exemplary circuit diagram that is used to touch detection according to some embodiments of the invention.Lead 310 and 320 is non-conterminous parallel lines of sensor 12.According to some embodiments of the present invention, inquiry lead 310 and 320 is to determine whether to exist finger.In order to inquire about this to lead, signal source I
a(as the AC signal source) is at this oscillator signal of inducting in to lead.Signal is referenced to common ground 350.When finger is placed on this on one of them of lead the time, between finger and lead 310, form capacitor C
TBecause have electromotive force between lead 310 and user's finger, so electric current flows to ground from lead 310 by finger.So, between lead 310 and its line are to 320, having formed electric potential difference, these two leads all are used as the input of differential amplifier 340.
With reference now to Fig. 3,, it illustrates the wire array as the Aristogrid sensor of differential amplifier input according to some embodiments of the invention.Spacing between two conductors 310 and 320 makes it possible to form necessary electric potential difference usually greater than the width of finger, and described spacing is approximately 12mm or 8mm-30mm for example.Differential amplifier 340 is amplified between lead 310 and 320 electric potential difference that forms, and ASIC 16 handles amplifying signal with digital units 20, and determines the position that the user points based on the amplitude and/or the signal level of institute's sensing signal thus.In one example, determine the position of user's finger by the phase place of checking output.In another example,, therefore determine the position of user's finger by the output of checking contiguous amplifier because finger touch produces output usually in more than a lead.In another example, can realize the combination of these two kinds of methods.According to some embodiment, digital processing element 20 can be operated the AC signal that offers the lead (as lead 310 and 320) of sensor 12 with control.Usually, the Fingertip touch on the sensor can be crossed over 2-8 line, for example 6 leads and/or 4 differential amplifier outputs.Usually, finger is placed on some leads, so that generate output signal in more than a differential amplifier (as a plurality of differential amplifiers).Yet, in the time of on being placed on a lead, also can detect Fingertip touch.
With reference now to Fig. 4,, its use Aristogrid sensor that schematically shows according to some embodiments of the invention carries out the capacitive touch method that Fingertip touch detects.At place, each point of crossing, there is the electric capacity of a certain minimum in 40 places, point of crossing in the sensor 12 for example between orthogonal conductor lines.In example embodiment, the one or more parallel wires in dimension sensor matrix 12 apply AC signal 60.When finger 41 during at a certain position of induced signal 60 touch sensor, applying the lead of signal 60 by it and increasing near the electric capacity between the corresponding orthogonal conductor lines of (at least proximal) touch location at least, and signal 60 armrests refer to that 41 cross to the electric capacity of corresponding orthogonal conductor lines, to produce output signal 65.This method can detect more than a finger touch (touch) simultaneously.This method can also be calculated the touch area.In example embodiment of the present invention, each lead all is input to amplifier.Alternatively, each line all is input to differential amplifier, and another input of amplifier is ground.Usually, the existence of finger has reduced 20-30% with coupled signal, because finger draws electric current from lead usually.
The present invention is not limited to the technical description of digitizer systems described here.The digitizer systems that is used to detect contact pilotage and/or fingertip location for example can be similar to the U.S. Patent No. of introducing 6,690,156, the digitizer systems of describing in U.S. Patent Application Publication No. 20040095333 and/or the U.S. Patent Application Publication No. 20040155871.It depends on their structure also applicable to other digitization system known in the art.
According to some embodiments of the present invention, the pattern of the pattern of detection signal amplitude and signal amplitude gradient, and be that to touch input and/or input be that finger tip touches and detects to finger tip with the signal input that they are used to verify Aristogrid.With reference now to Fig. 5 A and Fig. 5 B,, according to some embodiments of the present invention, Fig. 5 A illustrates from the exemplar signal of the signal amplitude output of the differential amplifier of Fingertip touch acquisition, and Fig. 5 B illustrates from the exemplar signal of the signal amplitude gradient of Fingertip touch acquisition.The inventor has been found that the distinctive signal pattern of Fingertip touch, and might distinguish Fingertip touch and for example other signal that detects on Aristogrid of the mechanical alteration that causes between Aristogrid and LCD because hand rests on the Aristogrid thus.
In Fig. 5 A, the zone 71 of Fingertip touch Aristogrid sensor a plurality of signals of on the vertical and horizontal wire of Aristogrid sensor, having inducted.From the amplitude of the detection signal of horizontal wire sensing by bar 73 expressions, and from the amplitude of the detection signal of horizontal wire sensing by bar 72 expressions.In some example embodiment, detection signal on conductor area 71 and in the adjacent wires.Usually, when finger tip presses down Aristogrid sensor and lcd screen, change the signal that has occurred in adjacent wires, inducting owing to the machinery of sensor and LCD.In some example embodiment, only consider the amplitude on the predefine level.
In Fig. 5 B, gradient signal amplitude gradient is defined in the absolute value of the difference of the amplitude of sensing on two adjacent wires.Alternatively, with gradient divided by the distance between the adjacent wires.In some example embodiment, only consider the gradient on the predefine level.Other known method of gradient can be implemented in the expression signal, and is used to verify Fingertip touch.
Usually, Fingertip touch can be characterized as being, and than higher, the zone reduces gradually to the periphery in the signal amplitude of the core of the touch area of being detected.Usually, can be desirably near the outer peripheral areas of the touch that is detected Grad than higher.When using lead when being imported into the digitizer systems of differential amplifier, approximate zero detection and/or " sky " output may appear in input, this is because simultaneously and/or to touch the lead that is input to same differential amplifier during same touch event right, makes two inputs equally be reduced by this touch.It is zero output signal and/or lower output signal substantially that " sky " output can cause.This betides the hand that can stride across bigger zone usually and touches, but also can occur in during the Fingertip touch.Embodiments of the invention have been considered the expected frequency that approximate zero detects, and touch (touching as hand) and Fingertip touch to distinguish big zone.According to embodiments of the invention, determine that based on the changes in amplitude and the graded of the output of Aristogrid sensor Fingertip touch detects and/or checking.
With reference now to Fig. 6,, it illustrates the process flow diagram that according to the signal of the checking Aristogrid of example embodiment of the present invention input is the method for the signal input that obtained by Fingertip touch.According to some embodiments of the present invention, the lead of inquiry sensor is with the signal at least one lead in the detecting sensor lead (frame 610).In example embodiment, inquire the lead of vertical and horizontal both direction.In other example embodiment, inquire the lead of one of this both direction, for example horizontal direction and/or the expectation direction of quantity lead that has the greatest impact.Replacedly, can inquire that expectation influences the direction of minimum number lead.When the signal amplitude of determining at least one lead is on the predefine event threshold, carry out finger tip checking (frame 620).In an example embodiment, when at least one lead of each direction is on the predefine event threshold in determining level and vertical direction, carry out the finger tip checking.In another example embodiment, when at least one lead on definite level or the vertical direction is on the predefine event threshold, carry out the finger tip checking.In another example embodiment, when at least one lead on definite assigned direction is on the predefine event threshold, carry out the finger tip checking.In some example embodiment, at least one lead in determining each is carried out the finger tip checking on the predefine event threshold time.In some example embodiment, the predefine event threshold equates on both direction.In other example embodiment, the predefine event threshold is all different in each direction.
Determine the pattern and/or the distribution of the signal amplitude that near the lead this at least one lead of the signal on the carrying predefine event threshold, detects, and preserve (frame 630) alternatively.In some example embodiment, the number of conductors of the distribution of being checked is subjected to the predetermined number of lead wires quantitative limitation of the every side of this at least one lead of the signal on carrying predefine event threshold.In other example embodiment, all leads are included in the determined distribution.In some embodiments of the invention, use to move or moving window is checked all leads in (group wise) mode in groups.For example, check 4 leads, check 4 leads in addition subsequently, these 3 leads that comprise from first group add 1 the new lead adjacent with these 3 leads, or the like.In an example embodiment, all leads of scanning and/or inquiry sensor in each, and the output when detecting threshold value on is when (as amplifier output) check that also down several amplifiers export.In an example, check following 3 outputs.
Determine that the gradient that signal amplitude distributes measures, and preserve (frame 640) alternatively.Determined range value value of being set to 0 (frame 650) below the predefine amplitude threshold.Usually, the predefine amplitude threshold in the frame 650 is lower than the event threshold in the frame 620.Determined Grad value of being set to 0 (frame 660) below the predefine Grads threshold.In an example embodiment, amplitude threshold equals Grads threshold on value.According to some embodiments of the present invention, the signal pattern that is obtained is used to verify that the touch event that is detected is the finger tip touch event.
In example embodiment more of the present invention, check one group of lead, for example output of differential amplifier (frame 670) at every turn.If the lead from the predefine quantity of this group has zero amplitude (for example below a certain threshold value), for example 1 (frames 680) in the middle of 4 leads determine that then the pattern that is detected is not finger tip pattern (frame 690).If the lead of the predefine quantity of measuring from this group gradient is near zero amplitude, for example 3 in the middle of 4 leads or more than 2 leads (frame 695) determine that then the pattern that is detected is not finger tip pattern (frame 690).If the lead that is less than predefine quantity then detects Fingertip touch pattern (frame 698) in zero amplitude.After checking first group of lead, check the one group of lead in back, for example change the group size that (in shifts of) lead and/or replacing are checked.Continue this process, up to for example detecting Fingertip touch, in group, not detecting signal or up to having checked all leads.According to some embodiments of the present invention, check amplitude pattern and gradient pattern, and require them to satisfy defined condition, so that the checking Fingertip touch.According to other embodiments of the invention, check amplitude pattern or gradient pattern, and use it for the checking Fingertip touch.Can use the distribution of checking signal amplitude and signal amplitude gradient to determine whether input signal is other method that obtains from Fingertip touch.
With reference now to Fig. 7 A and Fig. 7 B,, according to some embodiments of the present invention, Fig. 7 A illustrates the demonstration finger tip signal pattern of the pattern that shows the range value on the amplitude threshold, and Fig. 7 B illustrates the demonstration finger tip signal pattern of the pattern that shows the amplitude Grad of gradient on Grads threshold.Fig. 7 A and 7B are corresponding to the threshold value in advance (pre-threshold) shown in Fig. 5 A and the 5B.In Fig. 7 A, the signal that detects in zone 71 causes discovery in vertical direction to carry 4 continuous conductors 77 of the signal that is higher than amplitude threshold and find that in the horizontal direction 4 discontinuous leads 76 carryings are higher than the signal of amplitude threshold.In the horizontal direction, between 4 leads that are found the signal on the carrying amplitude threshold, there is one and has zero lead that reads.Like this, according to some embodiments of the present invention, the amplitude pattern shown in Fig. 7 A meets Fingertip touch.
In the demonstration pattern of Fig. 7 B, the signal that detects in zone 71 causes discovery in vertical direction to carry 4 continuous conductors 79 of the gradient signal on the Grads threshold and find 3 signals on the discontinuous leads 78 carrying Grads threshold in the horizontal direction.In the horizontal direction, between 3 leads that are found the signal on the carrying Grads threshold, there is interval with zero two leads that read.Owing in gradient pattern, only find 2 intervals, so the pattern shown in Fig. 7 B meets Fingertip touch.According to some embodiments of the present invention, the pattern shown in Fig. 7 A is checkings that finger tip touches input signal with the pattern shown in Fig. 7 B as input signal 71.Owing to only check a wicket at every turn, for example comprise the window of the output of 4 adjacent flat lines, therefore use said method can detect the Fingertip touch of one or more whiles.Pattern shown in Fig. 5 A, 5B, 7A and the 7B only is the demonstration pattern; The restriction of other definition of the space-number between use is read signal, other pattern also can meet the Fingertip touch checking.
With reference now to Fig. 8 A, 8B, 8C and 8D,, according to the embodiment of the invention, Fig. 8 A, 8B, 8C and 8D illustrate the exemplar signal of the hand touch of signal amplitude, signal amplitude gradient, the amplitude signal amplitude gradient on the predefine Grads threshold in signal amplitude on the predefine amplitude threshold and gradient amplitude respectively.According to embodiments of the invention, but pattern and/or the distribution of hand input signal 81 induced signal amplitudes on vertical direction 83 and horizontal direction 82.In some example embodiment, detection signal on the lead in zone 81 and in the adjacent wires.Usually, when finger tip presses down Aristogrid sensor and lcd screen, change the signal that has occurred in adjacent wires, inducting owing to the machinery of sensor and LCD.
Usually, hand touches the zone of the zone of influence greater than the Fingertip touch influence, therefore more differential amplifier " sky " output may occur.In fact, difference much bigger than shown in Fig. 7 and 8 usually.In addition, in hand touched, contact may be increased the weight of in the outer peripheral areas of hand, and in Fingertip touch, contact may be focusing more on the core of finger and/or evenly distribute.Like this, the one or more leads corresponding to zone 81 may read lower value and/or null value.In some example embodiment, occurred lower and/or null value reads, because output is differential amplifier output, and the signal in the differential input is much at one.
This relative homogeneity of signal also can be reflected in the gradient pattern 84 and 85 of institute's detection signal, and it shows and the corresponding low and/or zero gradient value of gradient corresponding to zone 81 core.When controlling chart 8C and 8D, read clearly corresponding to zero of zone 81 core and to illustrate in the horizontal direction, signal 86 and 88 for example, but so unobvious, for example signal 87 and 89 in vertical direction.In other example, situation may be opposite.Herein with Fig. 6 described in the method pattern that will in Fig. 8 A-8D, show as non-Fingertip touch pattern refusal, this be since the spacing between the signal value shown in Fig. 8 C and the 8D for example aspect the range value on the amplitude threshold greater than aspect 1 interval (Fig. 8 C) and the Grad on Grads threshold greater than 2 intervals (Fig. 8 D).Usually, when signal is rejected, " do not touch " data to the principal computer report.According to some embodiments of the present invention, method described here is used for the palm false touch and takes precautions against.The hand that the necessity that the palm false touch is taken precautions against results from the user is placed on the convenience (with comfortable) that uses contact pilotage and/or finger on the sensor simultaneously, and does not plan such touch is interpreted as user interactions.
The described in the above method of this paper can be applied to dissimilar Aristogrid sensors, for example the Aristogrid sensor described in Fig. 2 of the present invention and Fig. 4.In example embodiment, make each lead all be associated and/or be connected when being applied in Aristogrid sensor described in Fig. 4 with single amplifier, can reduce the space-number of before the refusal input signal, in amplitude pattern (amplitude pattern as shown in Figure 7A), allowing, for example be reduced to zero.Like this, any interval between contiguous amplitude reads and/or occur in any zero in institute's inspection and detect all corresponding to the zone that is detected as non-Fingertip touch input.Determining that the passing threshold amount allows that zero detects, and to consider may to be included in the zone of inducting when two leads of differential amplifier, for example produces zero situation about detecting in the system of differential wave (for example described in Fig. 2).For the system that does not write down differential wave between the lead, this consideration is unimportant.
With reference now to Fig. 9,, it illustrates description, and input is the example flow chart that finger tip touches the method for input signal according to the signal of the checking Aristogrid of another example embodiment of the present invention.Usually, with reference to figure 9 described methods with using with reference to figure 4 described touch detecting methods.According to some embodiments of the present invention,, estimate and consider the shape of signal input area when this input during corresponding to Fingertip touch.According to some embodiments of the present invention, absolute amplitude at least one lead on predefine event threshold level that reads by detection signal is discerned exist (frame 910) of touch event.Determine the range value (frame 920) of the signal that on the lead of sensor, detects.In some example embodiment, determine the pattern of range value in the defined range around the lead on signal reads in event threshold.In other example embodiment, inquire that all leads are to determine the pattern of range value.In some embodiments of the invention, the following range value of predefine amplitude threshold is set to zero detection.
According to some embodiments of the present invention, that determines to find on each orthogonal axes has a ratio (frame 930) between the number of conductors of the detection signal on the predefine amplitude threshold.In an example embodiment, determine the shape ratio, it is the ratio of the number of conductors that detected on number of conductors on the major axis of touch area and the minor axis.Carry out inquiry to determine that this ratio is whether in the predefine scope (frame 940).In some example embodiment, the Fingertip touch input is corresponding to the ratio of about 1:1 or 2:1.Alternatively, will refuse as non-finger pattern corresponding to the signal of the ratio outside this scope.According to some embodiments of the present invention, determine the zone (frame 960) of input signal.In an example embodiment, the zone of input signal is approximately rectangle, and determines based on the length of input signal on each orthogonal axes of sensor.The spacing that multiply by between the lead by the number of lead wires that will comprise the detection signal on the amplitude threshold for example is similar to this length.Inquire about with the zone determining to be calculated whether in specified scope (frame 970) corresponding to Fingertip touch.According to some embodiments of the present invention, at about 16mm
2To 500mm
2The surveyed area of scope is considered to the scope corresponding to Fingertip touch.Sensing range outside this range of definition is refused (frame 950) as non-finger tip signal.In an example embodiment, before ratio is determined, carry out the zone and determine.In another example embodiment, ratio is determined and/or relative with the two (as opposed to both) one of determined to be embodied as in the zone.According to some embodiments of the present invention, inquire about to determine to comprise the window (frame 980) of inspection area at interval.If find that then institute's detection signal is qualified is defined as the finger tip signal, otherwise refuses this signal without any window at interval.Determine gradient pattern (frame 985).Grad is poor between the signal amplitude that detects on adjacent and/or the adjacent wires.In an example embodiment, for example for the unevenly spaced grid of lead, with determined Grad divided by the distance between the adjacent wires.In some example embodiment, only consider the Grad on the Grads threshold, and other Grad is set to 0.Alternatively, Grads threshold has identical value with amplitude threshold.Determine the therefrom number of conductors N of detection signal.If determine in the gradient signal more than N-2 interval, then refuse this input signal (frame 990).Usually, when checking gradient image, therefore (for example on the profile of image) detection signal at the edge has N-2 at interval.Otherwise, input signal is verified as the finger tip input signal and with its acceptance (frame 995).In other embodiments of the invention, one or more frames can be omitted, and/or the order of frame can be rearranged.
According to some embodiments of the present invention, the space Hi-pass filter is used for determining the gradient pattern of input signal.Because, therefore will detecting signal amplitude only by high-frequency signal, the space Hi-pass filter changes very big zone.Usually, these zones are corresponding to the edge of Fingertip touch surveyed area, so the output of Hi-pass filter causes having the profile variations of bigger change.
Described herely be used to verify that the detection signal on the Aristogrid sensor is that the susceptibility of the method that touches of finger tip can be the function of Several Parameters, and these parameters and threshold value can be use specific.Different parameters comprises the threshold value that is used for signal amplitude and is used for defined ratio ranges, institute's defined range of input signal, the cutoff frequency of Hi-pass filter and the antenna number of being checked between the detection signal on the threshold value of " touch event ", the threshold value that is used for the signal amplitude gradient, the sensor orthogonal conductor lines.Detection signal on the described checking Aristogrid sensor is corresponding to one or more can being used in combination with other parameter in the parameter of Fingertip touch, or use separately.
According to some embodiments of the present invention, method described here can be used for distinguishing contact pilotage input, finger tip input and other user input.According to some embodiments of the present invention, some of them method described here can be on the principal computer 22, carrying out on the digital units 20 and/or on the ASIC unit 16.
Term " pattern " is not the zone that only refers to detection signal on the Aristogrid sensor at this.
Should also be understood that in above-described each feature and can institute might make up with sub-portfolio and make up, to produce example embodiment of the present invention.And all elements of describing at each embodiment not all is necessary also.In many cases, describe this element, or form the logic bridge between the essential elements so that description is used to carry out best mode of the present invention.The example that provides above comes down to exemplary, the scope that is not intended to limit the present invention, and scope of the present invention is only limited by following claims.
" comprise " at this used term, " comprising " and " having " and their tense change and mean " comprise but need not be confined to ".
Claims (46)
1. method that is used to verify the Fingertip touch input of Aristogrid, described method comprises:
Detection is from the pattern of the signal of the lead acquisition of Aristogrid sensor;
Described pattern is compared with predetermined finger tip feature; And
Relatively discern Fingertip touch input based on described.
2. the method for claim 1, wherein said lead is a parallel wire.
3. method as claimed in claim 1 or 2, wherein said lead comprise the parallel wire of two quadrature groups that form grid.
4. method as claimed in claim 3, wherein said two quadrature groups are electrically isolated from one.
5. as each described method among the claim 2-4, wherein said parallel wire equates at interval.
6. as each described method among the claim 2-5, wherein said parallel wire is 4mm at interval.
7. as each described method among the claim 2-6, wherein many described parallel wire is imported into differential amplifier.
8. method as claimed in claim 7, wherein said pattern are the patterns of differential amplifier output.
9. as claim 7 or 8 described methods, wherein said many be non-conterminous lead to parallel wire.
10. as each described method among the claim 1-9, wherein said pattern is the pattern of signal amplitude.
11. as each described method among the claim 1-10, wherein said pattern is the pattern of the signal amplitude on the predefine amplitude threshold.
12. as each described method among the claim 1-11, wherein said pattern is the pattern of signal amplitude gradient.
13. as each described method among the claim 1-12, wherein said pattern is the pattern of the signal amplitude gradient on the predefine Grads threshold.
14., comprising: the quantity of determining described signal pattern intermediate gap as each described method among the claim 1-13.
15. method as claimed in claim 14 comprises: the maximum quantity in definition gap, the qualified checking Fingertip touch of described signal pattern under this maximum quantity.
16., wherein use the capacitive touch method to detect described signal pattern as each described method among claim 1-6 or the 10-15.
17. as each described method among the claim 12-16, the space high pass filtered signals that wherein said signal amplitude gradient is described signal pattern.
18. method as claimed in claim 17, wherein said pattern is a contour patterns.
19., comprising as each described method among the claim 16-18:
Definite yardstick ratio that therefrom detects the zone of described Aristogrid sensor; And
Define the scope of the described ratio of qualified checking Fingertip touch.
20. method as claimed in claim 19 comprises:
Determine to detect the zone of the signal on the described Aristogrid sensor; And
Define the scope in the described zone of qualification testing Fingertip touch.
21. as each described method among the claim 1-20, wherein said Aristogrid sensor is transparent.
22. as each described method among the claim 1-21, wherein said detection comprises touch more and detects.
23. a system that is used to verify the finger tip input of Aristogrid comprises:
The Aristogrid sensor comprises a plurality of leads; And
Controller is used to verify the detection based on the Fingertip touch input from the pattern of the output of described a plurality of leads.
24. system as claimed in claim 23, wherein said a plurality of leads comprise parallel wire.
25. as claim 23 or 24 described systems, wherein said a plurality of leads comprise the parallel wire of two quadrature groups that form grid.
26. system as claimed in claim 25, wherein said two quadrature groups are electrically isolated from one.
27. as each described system among the claim 23-26, wherein said a plurality of conductor spacings equate.
28. as each described system among the claim 23-27, wherein said a plurality of conductor spacing 4mm.
29., wherein many described parallel wire is imported into differential amplifier as each described system among the claim 23-28.
30. method as claimed in claim 29, wherein said pattern are the patterns of differential amplifier output.
31. as claim 29 or 30 described methods, wherein said many be non-conterminous lead to parallel wire.
32. as each described system among the claim 23-31, wherein said controller is used for determining according to described output the pattern of signal amplitude.
33. as each described system among the claim 23-32, wherein said controller is used for determining according to the output on the predefine amplitude threshold pattern of signal amplitude.
34. as each described system among the claim 23-33, wherein said controller is used for determining according to described output the pattern of signal amplitude gradient.
35. as each described system among the claim 23-34, wherein said controller is used for determining according to the output on the predefine Grads threshold pattern of signal amplitude gradient.
36. as each described system among the claim 23-35, wherein said controller is used for determining the quantity of described signal pattern intermediate gap.
37. system as claimed in claim 36, wherein said controller is used to refuse and the corresponding input signal of pattern with the gap that is higher than predefine maximum quantity gap.
38., wherein use the capacitive touch method to detect the pattern of output as each described system among claim 23-28 or the 32-37.
39. as each described system among the claim 34-38, wherein said signal amplitude gradient is the high pass filtered signals of described output.
40. system as claimed in claim 39, wherein said pattern is a contour patterns.
41. as each described system among the claim 38-40, wherein said controller is used for determining therefrom detecting the yardstick ratio in the zone of described output, and determines that described ratio is whether in the predefine ratio ranges of qualified checking Fingertip touch.
42. system as claimed in claim 41, wherein said controller is used for determining described zone whether in the predefine regional extent of qualified checking Fingertip touch, and determines that described yardstick is whether in the predefine range scale of qualified checking Fingertip touch.
43. as each described system among the claim 23-42, wherein said Aristogrid sensor is transparent.
44. as each described system among the claim 23-43, wherein said controller is used to detect multi-touch input.
45. as each described system among the claim 23-44, comprise principal computer, wherein said principal computer is communicated by letter with described controller.
46. system as claimed in claim 45, the input that wherein said controller will be verified as the finger tip input sends to described principal computer.
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| CN102483666A (en) * | 2009-08-31 | 2012-05-30 | 高通股份有限公司 | Pressure sensitive user interface for mobile devices |
| CN103873455A (en) * | 2012-12-18 | 2014-06-18 | 阿里巴巴集团控股有限公司 | Method and device for information check |
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| CN102483666A (en) * | 2009-08-31 | 2012-05-30 | 高通股份有限公司 | Pressure sensitive user interface for mobile devices |
| CN102043516A (en) * | 2009-10-13 | 2011-05-04 | 索尼公司 | Information input device, information input method, information input/output device, and electronic unit |
| CN103873455A (en) * | 2012-12-18 | 2014-06-18 | 阿里巴巴集团控股有限公司 | Method and device for information check |
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| CN106095317A (en) * | 2016-06-15 | 2016-11-09 | 青岛海信电器股份有限公司 | The response method of a kind of touch screen and terminal |
| CN106095317B (en) * | 2016-06-15 | 2020-07-10 | 海信视像科技股份有限公司 | Touch screen response method and terminal |
Also Published As
| Publication number | Publication date |
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| WO2007144881A1 (en) | 2007-12-21 |
| JP2009540452A (en) | 2009-11-19 |
| CN102855036A (en) | 2013-01-02 |
| CN101501619B (en) | 2012-09-26 |
| JP5122560B2 (en) | 2013-01-16 |
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