CN106557213B - A kind of method for detecting of condenser type three-dimensional detecting module - Google Patents
A kind of method for detecting of condenser type three-dimensional detecting module Download PDFInfo
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Abstract
The present invention provides a kind of method for detecting of condenser type three-dimensional detecting module, one condenser type three-dimensional detecting module is provided, the condenser type three-dimensional detecting module includes a capacitance touching control sensor and a piezoelectric pressure indicator and an integrated condenser type Three dimensions control device on a chip, the capacitance touching control sensor includes multiple touch control units, the piezoelectric pressure indicator includes an at least pressure sensitivity unit, and the method for detecting is comprising steps of S1: mutual capacitance mode being used to carry out the detecting of touching signals to the multiple touch control unit to determine touch point position；And S2: it uses self-capacitance mode to carry out the detecting of pressure signal to an at least pressure sensitivity unit and presses force value size to determine；By condenser type Three dimensions control device progress calculation process, the starting point and end point in the detecting period of touching signals misplace with the starting point in pressure signal detecting period and end point for the touching signals and the pressure signal.The capacitor method for detecting is simple and practicability is good.
Description
[technical field]
The present invention relates to touch-control pressure sensitivity field more particularly to a kind of method for detecting of condenser type three-dimensional detecting module.
[background technique]
With the development of touch technology, most of either existing industrial electronic device or consumer electronics device are all adopted
With the touch-control module with touch function, the touch-control module surface with touch function is by from finger and stylus etc.
Operation when, electronic device executes specific operation by detecting the position of touch point.Detecting for touch point, either
Capacitance plate or touch screens determine the two-dimensional coordinate of touch point on the display apparatus, by different principles with touch-control
Surface where operating surface is established two-dimensional coordinate system (X, Y), and the detection of touch point is equivalent to determine touch point in the position of X-direction
Set and Y direction on position, that is, determine touch point two-dimensional position.
In order to further enrich the touch-control module with touch function, existing part touch-control module can install pressure biography additional at present
For sensor to form three-dimensional detecting module, the pressure sensor includes multiple pressure sensitivity units, the pressure sensitivity unit at touch point
Induction can generate certain deformation from the pressing force perpendicular to touch-control module (being equivalent to Z-direction) so as to cause pressure sensitivity unit
The electric signal at place changes, and can determine pressure suffered by pressure sensitivity unit to the electrical number detecting.Different location touch-control
Point matches settable corresponding apparatus function when different pressing force value, i.e., we can be from touch point (X, Y) and pressure (Z) institute circle
Fixed 3D (3-dimension is three-dimensional) angle goes abundant design to be formed and have both touch detection function and pressure detection function
Three-dimensional detecting module.
However, being loaded with the three-dimensional detecting module of pressure sensor in today of the increasingly lightening low price of electronic equipment
Hardware is extremely complex, and the hardware of touch sensing and the hardware of pressure sensor respectively independently (need at least two sets of hardware mostly
Equipment, hardware device include multiple chips), there is the disadvantages of at high cost, big energy-consuming.Due to its mutual independence, described three
The whole method for detecting for tieing up detecting module is also relative complex.
In fact, mainly adopting mutual capacitance sense mode for the touch chip at present to support detecting position of touch
Based on, and the prior art for force snesor by pressure change when, mainly detect two kinds with impedance detecting and capacitance variation
Detecting aspect is selection；It merits attention, if touch detection uses mutual capacitance type, and pressure change is by the way of impedance detecting
When, the general hardware used (multiple chip collocation Wheatstone bridges is needed to solve signal detection and processing) is seemed complicated.
For industry, signal detection scheme (detecting kenel with capacitor) is solved with existing touch chip if can develop
Basis, and be detected pressure-sensing signal also with capacitor kenel, realize and directly prop up existing condenser type detecting chip technology
Three-dimensional detecting application is held, as industry is expected.
[summary of the invention]
To overcome hardware present in three-dimensional detecting module at present complicated (multiple chips is needed to solve signal processing) and detecing
The problem of survey method complexity, the present invention provide a kind of method for detecting of condenser type three-dimensional detecting module.
The present invention provides a kind of technical solutions for solving above-mentioned technical problem: a kind of condenser type three-dimensional detecting module is detectd
Survey method, provides a condenser type three-dimensional detecting module, and the condenser type three-dimensional detecting module includes a capacitance touching control sensor
With a piezoelectric pressure indicator and an integrated condenser type Three dimensions control device on a chip, the capacitance touching control sensing
Device includes multiple touch control units, and the piezoelectric pressure indicator includes that an at least pressure sensitivity unit, the method for detecting successively wraps
It includes step: S1: mutual capacitance mode being used to carry out the detecting of touching signals to the multiple touch control unit to determine touch point position；
And S2: using self-capacitance mode to carry out the detecting of pressure signal to an at least pressure sensitivity unit and press force value size to determine,
An at least pressure sensitivity unit is corresponding with touch point position identified in step S1 in this step；The touching signals
And the pressure signal carries out calculation process by the condenser type Three dimensions control device, the detecting period of the touching signals rises
Initial point and end point misplace with the starting point in pressure signal detecting period and end point, the piezoelectric pressure indicator
Including the first pressure sensitivity layer and the second pressure sensitivity layer, the first pressure sensitivity layer is positive temperature made of the pressure sensitivity material using positive temperature coefficient
Coefficient pressure sensitivity layer is spent, the second pressure sensitivity layer is negative temperature coefficient pressure sensitivity layer made of the pressure sensitivity material using negative temperature coefficient,
Temperature of the pressure signal of pressure sensitivity unit as the pressure signal of pressure sensitivity unit on the first pressure sensitivity layer on the second pressure sensitivity layer
Spend target compensation.
Preferably, an at least pressure sensitivity unit is correspondingly arranged with multiple touch control unit positions.
The present invention also provides a kind of method for detecting of condenser type three-dimensional detecting module, provide condenser type three-dimensional detecting mould
Block, the condenser type three-dimensional detecting module include that a capacitance touching control sensor and a piezoelectric pressure indicator and one are integrated
Condenser type Three dimensions control device on a chip, the capacitance touching control sensor include multiple touch control units, the piezoelectric type
Pressure sensor includes an at least pressure sensitivity unit, and the method for detecting is comprising steps of T21: using mutual capacitance mode to described more
A touch control unit carries out the detecting of touching signals to determine touch point position；And T22: using self-capacitance mode to described at least one
Pressure sensitivity unit carries out the detecting of pressure signal and presses force value size to determine；Step T21 and step T22 are carried out independently of each other；Institute
It states touching signals and the pressure signal and calculation process is carried out by the condenser type Three dimensions control device, the touching signals are detectd
The starting point and end point for surveying the period misplace with the starting point in pressure signal detecting period and end point, the piezoelectric type
Pressure sensor includes the first pressure sensitivity layer and the second pressure sensitivity layer, and the first pressure sensitivity layer is the pressure sensitivity material using positive temperature coefficient
Manufactured positive temperature coefficient pressure sensitivity layer, the second pressure sensitivity layer are negative temperature system made of the pressure sensitivity material using negative temperature coefficient
Pressure sensitivity layer is counted, pressure of the pressure signal of pressure sensitivity unit as pressure sensitivity unit on the first pressure sensitivity layer on the second pressure sensitivity layer
The temperature-compensating object of signal.
Preferably, the first pressure sensitivity layer is positive temperature coefficient pressure sensitivity made of the pressure sensitivity material using positive temperature coefficient
Layer, the second pressure sensitivity layer are negative temperature coefficient pressure sensitivity layer made of the pressure sensitivity material using negative temperature coefficient, second pressure
Feel temperature-compensating object of the pressure signal of pressure sensitivity unit on layer as the pressure signal of pressure sensitivity unit on the first pressure sensitivity layer.
Preferably, the detecting of the touching signals is carried out with the detecting timesharing sequence of the pressure signal.
Preferably, the detecting of the touching signals is carried out with the detecting of the pressure signal with timing.
Preferably, an at least pressure sensitivity unit is correspondingly arranged with multiple touch control unit positions.
Preferably, the piezoelectric pressure indicator includes an at least flexible substrate layer, the two of the flexible substrate layer
The first pressure sensitivity layer and the second pressure sensitivity layer is respectively set in side.
Preferably, the condenser type Three dimensions control device is to the pressure signal of pressure sensitivity unit on the first pressure sensitivity layer and described
The pressure signal of pressure sensitivity unit is overlapped on second pressure sensitivity layer.
Compared with prior art, condenser type three-dimensional detecting module provided by the present invention is at having the advantages that
1. condenser type three-dimensional detecting module can first detect touch point in the detecting of touch point position and pressing force value
Position, then detect pressing force value suffered by the corresponding pressure sensitivity unit in touch point position place again, therefore, pressing force value
Detecting during, condenser type Three dimensions control device is optionally not necessarily to all once detect pressure sensitivity unit, improves
Efficiency is detected, hardware deterioration is reduced.
2. the detecting of the detecting of touch point position and pressing force value mutually indepedent timesharing sequence or can also be carried out with timing.By
In touching signals with pressure signal because the signal type variation caused by touch control operation is consistent.Therefore it described is easy to produce between the two
When the detecting timesharing sequence of signal interference, pressure detection and touch point carries out, since the two detecting timing mutually staggers, therefore mutually it
Between interference can reduce to avoid signal erroneous judgement.Further, the pressure signal and the current potential of touching signals detecting switch
Point is staggered, and can further decrease interfering with each other between signal.At the same time when sequence, in the starting point of touching signals detecting
The detecting of (current potential point of contact) pressure signal starts or is over not yet, even if producing interference signal, between them
The possibility interfered with each other is avoided, and is detected at starting point and end point (current potential switching point) in pressure signal, touching signals
Detecting be in stationary phase, therefore, interference between the two is also little.
3. the piezoelectric pressure indicator includes at least a flexible substrate layer, the flexible substrate layer uses flexible material
Production, can sensitive induction pressure caused by touch point and deformation occurs.It is arranged in the two sides of the flexible substrate layer
There are the first pressure sensitivity layer and the second pressure sensitivity layer, the first pressure sensitivity unit and second being located on the first pressure sensitivity layer and the second pressure sensitivity layer
Pressure sensitivity unit size position corresponds, in the references object of the first pressure sensitivity unit and the second pressure sensitivity unit temperature-compensating each other
When, due to the correspondence of its size positions, respectively it is suffered as temperature and other interfere brought by noise warning signal it is consistent, pass through
Other generated noise warning signals during pressure signal detecting can be preferably eliminated after crossing the processing such as computing circuit.Promote pressure
Force detection precision；Furthermore the first pressure sensitivity unit and the second pressure sensitivity unit corresponding to touch point also carry out Signal averaging, condenser type
Three-dimensional detecting module detects stronger more stable pressure signal.The processing of the pressure signal of first pressure sensitivity layer and the second pressure sensitivity layer was both
It can be set to temperature-compensating mode, and can take into account as pressure signal stacked system, there is flexible design, it is structurally reasonable etc. excellent
Point.
4. touch control unit is driven with pressure sensitivity unit by same common driver, which save hardware costs, simplify
Circuit design, improves condenser type three-dimensional detecting module integrated level, and reduces the detecting of condenser type three-dimensional to a certain extent
The thickness and weight of module.
[Detailed description of the invention]
Fig. 1 is the layer structure schematic diagram of first embodiment of the invention condenser type three-dimensional detecting module.
Fig. 2 is the planar structure schematic diagram of the touch control electrode layer of first embodiment of the invention condenser type three-dimensional detecting module.
Fig. 3 is the enlarged structure schematic diagram in Fig. 2 at A.
Fig. 4 is the cross-sectional view of the piezoelectric pressure indicator of first embodiment of the invention condenser type three-dimensional detecting module.
Fig. 5 is the modular structure signal of the signal processing circuit of first embodiment of the invention condenser type three-dimensional detecting module
Figure.
Fig. 6 A is that the touching signals detecting of first embodiment of the invention condenser type three-dimensional detecting module is detected with pressure signal
Timing diagram.
Fig. 6 B is that the touching signals detecting of first embodiment of the invention condenser type three-dimensional detecting module is detected with pressure signal
The variant embodiment one of timing diagram.
Fig. 6 C is that the touching signals detecting of first embodiment of the invention condenser type three-dimensional detecting module is detected with pressure signal
The variant embodiment two of timing diagram.
Fig. 6 D is that the touching signals detecting of first embodiment of the invention condenser type three-dimensional detecting module is detected with pressure signal
The variant embodiment three of timing diagram.
Fig. 7 is the layer structure schematic diagram of second embodiment of the invention condenser type three-dimensional detecting module.
Fig. 8 is the layer structure schematic diagram of third embodiment of the invention condenser type three-dimensional detecting module.
Fig. 9 is the modular structure signal of the signal processing circuit of third embodiment of the invention condenser type three-dimensional detecting module
Figure.
Figure 10 is that the touching signals detecting of third embodiment of the invention condenser type three-dimensional detecting module is detected with pressure signal
Timing diagram.
Figure 11 is the configuration schematic diagram of third embodiment of the invention condenser type three-dimensional detecting module.
Figure 12 be third embodiment of the invention condenser type three-dimensional detecting module the first touch control electrode layer distressed structure
Schematic diagram.
Figure 13 is the flow chart of the method for detecting of fourth embodiment of the invention condenser type three-dimensional detecting module.
Figure 14 is the flow chart of the method for detecting of fifth embodiment of the invention condenser type three-dimensional detecting module.
[specific embodiment]
In order to make the purpose of the present invention, technical solution and advantage are more clearly understood, below in conjunction with attached drawing and embodiment,
The present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
Referring to Fig. 1, first embodiment of the invention condenser type three-dimensional detecting module 10 includes one (of the invention from top to bottom
In, up and down, top, the positions word such as bottom be only used for limiting the relative position in given view, rather than absolute position) successively
Including a touch panel 14, a laminating layer 12 and a pressure sensor 10s, the touch panel 14 pass through laminating layer 12 and pressure
Electric-type pressure sensor 10s fitting, the condenser type three-dimensional detecting module 10 further comprises a three dimensional signal processing circuit 18,
The lower section of piezoelectric pressure indicator 10s is arranged in the three dimensional signal processing circuit 18, and position is not construed as limiting.The three-dimensional
Signal processing circuit 18 is electrically connected at touch panel 14 and piezoelectric pressure indicator 10s.
Touch panel 14 includes a upper substrate 11 and a capacitance touching control sensor 13, the capacitance touching control sensor 13
It is set to the lower surface of the upper substrate 11.Upper substrate 11 is it can be assumed that be the touch cover board of electronic equipment, so-called cover board packet
A touch operation surface and a component mounting surface are included, touch operation surface carries out touch control operation, component for finger or stylus etc.
Mounting surface is then used to install touch control electrode component or display module etc..
Flexible substrate layer 16 is flexible material, preferably, thickness, less than 500 μm, more preferably, thickness is less than 200 μm.It is flexible
16 material of substrate layer can be polymer film, and the polymer film is such as including polyethylene terephthalate (PET), poly- naphthalene
The film of naphthalate (PEN), polymethyl methacrylate (PMMA) or polycarbonate, thin glass sheet is (for example, 100 μm
It is thick or thinner) or soda-lime-silica glass.
Firstly, please referring to Fig. 2 and Fig. 3, the capacitance touching control sensor clearly to chat bright 14 embodiment of touch panel
13 include a plurality of first direction touch-driven electrode 131 equidistantly arranged in parallel along first direction (X-direction) and a plurality of edge
Second direction (Y-direction) the second direction touch-control receiving electrode 132 that equidistantly arranges in parallel, it is described a plurality of to be arranged parallel to each other
First direction touch-driven electrode 131 is orthogonal with a plurality of second direction touch-control receiving electrode 132 being arranged parallel to each other, in the two
Overlapping region at be provided with collets 133, the collets 133 are located at first direction touch-driven electrode 131 and second party
It is electrically isolated between touch-control receiving electrode 132 by both described.The first direction touch-driven electrode 131 and second direction
Touch control unit (not labeled) is defined between touch-control receiving electrode 132, that is, array is provided on 11 lower surface of upper substrate
Multiple touch control units.Corresponding electric signal transmission is generated after the touch control unit detects the touch control operation from upper substrate 11
To three dimensional signal processing circuit 18.It is only received in Fig. 2 with 4 first direction touch-driven electrode 131 and 4 second direction touch-controls
It is illustrated for electrode 132, in fact, quantity is with no restriction.The first direction touch-driven electrode 131 and
The setting locations complementary of two direction touch control receiving electrodes 132.
Secondly, please referring to Fig. 1 and Fig. 4, piezoelectric pressure clearly to chat bright piezoelectric pressure indicator 10s embodiment
Sensor 10s is described from top to bottom successively including one first pressure sensitivity layer 15, a flexible substrate layer 16 and one second pressure sensitivity layer 17
First pressure sensitivity layer 15 and the second pressure sensitivity layer 17 are arranged in 16 two sides of flexible substrate layer and using flexible substrate layer 16 as bearing bed.
As shown in Figure 4, at least one first pressure sensitivity unit 151 is provided on the first pressure sensitivity layer 15, be provided on the second pressure sensitivity layer 17 to
A few second pressure sensitivity unit 171, the first pressure sensitivity unit 151 and 171 shape of the second pressure sensitivity unit can be rectangle, polygon,
Circle, one of irregular shapes such as trapezoidal or a variety of.Positioned at the first pressure sensitivity layer of 16 upper and lower surface of flexible substrate layer
15 is consistent with 17 geomery of the second pressure sensitivity layer, and the second pressure sensitivity unit 171, multiple first pressure sensitivity are provided on the second pressure sensitivity layer 17
Position corresponds between unit 151 and multiple second pressure sensitivity units 171.Touch control operation person carries out in the upper surface of upper substrate 11
When touch control operation, corresponding at least one first pressure sensitivity unit 151 at the touch point, or at least one first pressure sensitivity unit 151 with extremely
Few one second pressure sensitivity unit 171 will be under pressure simultaneously.
The first pressure sensitivity unit 151 and/or the second pressure sensitivity unit 171 are the pressure as caused by touch control operation and cause
The compliances such as deformation, deflection or shearing react the pressure sensitivity material to change so as to cause at least one electrical property, the present invention
In be adopted as piezoelectric material, the first pressure sensitivity unit 151 and/or the second pressure sensitivity unit 171 can generate capacitor in response to push action
The variation of amount.In other embodiments the first pressure sensitivity unit 151 and/or 171 material of the second pressure sensitivity unit can be barium titanate or
One of lead zirconate titanate (PZT) and piezoelectric ceramics etc. are a variety of, can also be and are dispersed in insulation, transparent, deformable matrix
In indium tin oxide (ITO), the tin oxide (ATO) for mixing antimony, the zinc oxide (AZO) or other transparent conductive oxides of mixing aluminium
Particle.
Referring to Fig. 5, Fig. 5 is the modular structure schematic diagram of the common three dimensional signal processing circuit 18 of the present invention, but not
It is limited with this module.Point out that three dimensional signal processing circuit 18 includes a condenser type Three dimensions control device 180, the three-dimensional touch in Fig. 5
Device 180 is integrated on a chip, and piezoelectric pressure indicator 10s and capacitance touching control sensor 13 are electrically connected at condenser type
Three dimensions control device 180.The condenser type Three dimensions control device 180 further comprises a common driver 181, driving pulse processing
Circuit 187 and a condenser type three-dimensional processor 189, the driving pulse processing circuit 187 further comprise a selection circuit
183 and one pulse reform circuit 185, driving signal provided by the common driver 181 is directly output to capacitive touch
It controls sensor 13 and provides touch-control scanning pulse for it, the driving pulse processing circuit 187 is defeated by the common driver 181
Driving signal out is displaced, pulsewidth constriction, provides pressure scanning arteries and veins after the processing such as frequency dividing for piezoelectric pressure indicator 10s
Punching.Local circuit within the driving pulse processing circuit 187 also can change and be not limited with the change of method for detecting.
When 11 surface of upper substrate operates, piezoelectric pressure indicator 10s and capacitance touching control sensor 13 can be distinguished user
Pressure signal and touching signals are detected, the pressure signal and touching signals are conducted by route to condenser type three-dimensional processor
189, the condenser type three-dimensional processor 189 handles pressure signal and touching signals.
Selection circuit 183 selects all or part of driving signal to be transmitted to pulse from common driver 181 and reforms circuit
185, driving pulse processing circuit 187 can also only be arranged pulse and reform circuit 185/ or selection circuit 183.
The method for detecting of corresponding condenser type three-dimensional detecting module 10 is as follows:
The touching signals and pressure of touch control unit and pressure sensitivity unit (the first pressure sensitivity unit 151 and the second pressure sensitivity unit 171)
There are many detecting modes of signal, in the present invention, detects touching signals using mutual capacitance mode, is detectd by the way of self-capacitance
Measuring pressure signal.
The mutual capacitance mode detects touching signals specifically: the touch control unit is by first direction touch-driven electrode
131 are defined with second direction touch-control receiving electrode 132, with capacity effect, i.e., first direction touch-driven electrode 131 with
Capacitor is formed between second direction touch-control receiving electrode 132, first direction touch-driven electrode 131 is equivalent to the upper pole of capacitor
Plate, the second direction touch-control receiving electrode 132 are equivalent to the bottom crown of capacitor, when user's finger or stylus etc. are in upper substrate
When carrying out touch control operation on 11, the coupling on the touch control unit of touch point between bottom crown is affected, to change the two
Capacitance between pole plate.The change of the capacitance forms touching signals and is transferred to condenser type three-dimensional processor 189, the electricity
Appearance formula three-dimensional processor 189 carries out the position of confirmation touch point after signal processing.In detecting between bottom crown when mutual capacitance size,
First direction touch-driven electrode 131 receives the touch-control scanning pulse from common driver 181, i.e. first direction touch-control drives
Electrode 131 issues pumping signal, and second direction touch-control receiving electrode 132 receives touching signals and passed touching signals by route
It is directed at condenser type three-dimensional processor 189.
The self-capacitance mode detects pressure signal specifically: each pressure sensitivity unit include at least a pressure-driven electrode with
One pressure receiving electrode (scheme not regard, i.e., each pressure sensitivity unit of two electrodes construction be complete loops input electrode and output
Electrode), the pressure-driven electrode receives the pressure scanning pulse for carrying out self-capacitance Three dimensions control device 180, i.e. pressure-driven electricity
Pole issues pumping signal, and pressure receiving electrode receives pressure signal and conducted pressure signal to condenser type three-dimensional by route
Manage device 189.
The touching signals detecting timing that Fig. 6 A, It_1 and It_2 respectively represent two different touch control units is please referred to, it is described
Ifa_1 detects timing, Ifb_1 from the Ifa_2 pressure signal for representing two the first different pressure sensitivity units 151 on the first pressure sensitivity layer 15
Timing is detected from the Ifb_2 pressure signal for representing two the second different pressure sensitivity units 171 on the second pressure sensitivity layer 17, described two is different
The first pressure sensitivity unit 151 it is different from two 171 position of the second pressure sensitivity unit it is corresponding.
It can be seen that the detecting of touch point position and the detecting of pressure value size separately carry out from Fig. 6 A, and the electricity
Appearance formula Three dimensions control device 180 is position and then the corresponding touching of detecting for first carrying out the determining touch point of detecting of touch point position
Corresponding pressure sensitivity unit at control point position.The touching signals of touch control unit are detected and the pressure signal of pressure unit detects timesharing
Sequence carries out, i.e., both touching signals detecting detected with pressure signal separately carry out the period is not present in timing it is Chong Die.The
The detecting of one pressure sensitivity unit 151 and the pressure signal of the second pressure sensitivity unit 171 carries out simultaneously.Only with specific several in the present invention
The explanation of detecting timing is carried out for touch control unit and pressure sensitivity unit, actually touch control unit is not limited with pressure sensitivity element number
Fixed, the amplitude of signal is consistent in diagram, has been not used to restriction effect only for facilitating diagram schematically illustrate.
Fig. 6 B is please referred to, the variant embodiment one as touch control unit and pressure sensitivity unit detecting timing: the touching of touch control unit
The detecting of the pressure signal of control signal detection and pressure unit is still that timesharing sequence carries out, but condenser type Three dimensions control device 180 is simultaneously
Position of touch is not determined first detects pressing force value again later.The mutually indepedent timesharing sequence of the detecting of pressure detection and touch point into
Row.
Fig. 6 C is please referred to, the variant embodiment two as touch control unit and pressure sensitivity unit detecting timing: is deformed with Fig. 6 B
The cycle time (pulsewidth narrows) that the difference is that only pressure signal detecting in embodiment one, makes adjacent touch signal and pressure
Detecting end point and the starting point of force signal are staggered, i.e., (from " 0 " to " 1 " or " 1 " to " 0 ") phase at the current potential switching point of the rwo
It is mutually staggered, avoids mutual interference.As a kind of variant embodiment, period of pressure signal detecting can and touching signals
The cycle portions of detecting are overlapped, but current potential switching point misplaces.
Fig. 6 D is please referred to, the variant embodiment three as touch control unit and pressure sensitivity unit detecting timing: the pressure detection
Detecting with touch point is carried out with timing independently of each other, and position of touch and the detecting of pressing force value do not carry out successively, and touch-control
The touching signals of unit are detected and the detecting of the pressure signal of pressure unit is that same timing carries out, that is, condenser type three-dimensional control
Device 180 processed is while detecting pressure value also in detecting touch point position.
In inventing all embodiments, so-called same timing refers in touching signals detecting with pressure signal detecting in a work
Make the presence of overlapping (not including endpoint overlapping) in period (current potential is " 1 "), conversely, being then timesharing sequence.
First pressure sensitivity layer 15 and second pressure sensitivity layer 17 of the condenser type three-dimensional processor 189 to piezoelectric pressure indicator 10s
On pressure signal processing mode can at least embody temperature-compensating and pressure signal because of the selection of its material difference and be superimposed two kinds
Beneficial effect；It is worth mentioning, the first pressure sensitivity unit 151 difference under the temperature-compensating mode, on the first pressure sensitivity layer 15
The dry news of heat are eliminated as mutual temperature compensated reference object with the second pressure sensitivity unit 171 corresponding on the second pressure sensitivity layer 17
Pressure signal brought by number detects error.
As a kind of excellent embodiment, the first pressure sensitivity unit 151 and the second pressure sensitivity unit 171 selected using different materials
Material production, the specially described first pressure sensitivity layer 15 are positive temperature coefficient pressure sensitivity made of the piezoelectric material using positive temperature coefficient
Layer, the second pressure sensitivity layer 17 are negative temperature coefficient pressure sensitivity layer made of the piezoelectric material using negative temperature coefficient, the positive temperature
It spends coefficient pressure sensitivity layer and negative temperature coefficient pressure sensitivity layer generated noise warning signal size under the influence of identical environment is identical or approximate,
But its polarity is on the contrary, event, under pressure signal stacked system, can make the first pressure sensitivity layer 15 and second by circuit design
The noise signal of pressure sensitivity layer 17 is offset, the double enhancing of pressure signal.Using the piezoelectric material of positive temperature coefficient and negative
The cooperation of the piezoelectric material of temperature coefficient not only can achieve noise reduction effect brought by temperature-compensating mode, also reach
Pressure signal reinforcing effect brought by pressure signal stacked system.
Condenser type three-dimensional detecting module 10 provided by the present invention can be used for multi-point touch.
Compared with prior art, the condenser type three-dimensional detecting module 10 and its method for detecting that the present invention discloses at least have
Following advantage:
1. condenser type three-dimensional detecting module 10 can first detect touch-control in the detecting of touch point position and pressing force value
The position of point, then detects pressing force value suffered by the corresponding pressure sensitivity unit in touch point position place, therefore, in pressing force again
During the detecting of value, condenser type Three dimensions control device 180 optionally without all once being detected to pressure sensitivity unit, is mentioned
High detecting efficiency, reduces hardware deterioration.
2. the detecting of the detecting of touch point position and pressing force value mutually indepedent timesharing sequence or can also be carried out with timing.By
In touching signals with pressure signal because the signal type variation caused by touch control operation is consistent.Therefore it described is easy to produce between the two
When the detecting timesharing sequence of signal interference, pressure detection and touch point carries out, since the two detecting timing mutually staggers, therefore mutually it
Between interference can reduce to avoid signal erroneous judgement.Further, the pressure signal and the current potential of touching signals detecting switch
Point is staggered, and can further decrease interfering with each other between signal.At the same time when sequence, in the starting point of touching signals detecting
The detecting of (current potential point of contact) pressure signal starts or is over not yet, even if producing interference signal, between them
The possibility interfered with each other is avoided, and is detected at starting point and end point (current potential switching point) in pressure signal, touching signals
Detecting be in stationary phase, therefore, interference between the two is also little.
3. the piezoelectric pressure indicator 10s includes at least a flexible substrate layer 16, the flexible substrate layer 16 is used
Flexible material production, can sensitive induction pressure caused by touch point and deformation occurs.In the flexible substrate layer 16
Two sides be provided with the first pressure sensitivity layer 15 and the second pressure sensitivity layer 17, be located on the first pressure sensitivity layer 15 and the second pressure sensitivity layer 17
First pressure sensitivity unit 151 and 171 size positions of the second pressure sensitivity unit correspond, in the first pressure sensitivity unit 151 and the second pressure sensitivity
When the references object of the temperature-compensating each other of unit 171, due to the correspondence of its size positions, respectively it is suffered as temperature and its
He interferes brought noise warning signal consistent, and pressure signal detecting process can be preferably eliminated after the processing such as computing circuit
In caused by other noise warning signals.Adherence pressure detects precision；Furthermore the first pressure sensitivity unit 151 corresponding to touch point and
Two pressure sensitivity units 171 also carry out Signal averaging, and condenser type three-dimensional detecting module 10 detects stronger more stable pressure signal.The
The processing of the pressure signal of one pressure sensitivity layer 15 and the second pressure sensitivity layer 17 not only can be set to temperature-compensating mode, but also can take into account as pressure
Force signal stacked system is especially that second pressure sensitivity is made using the pressure sensitivity material of positive temperature coefficient in the first pressure sensitivity layer 15
Layer 17 can achieve pressure signal superposition when being made of the pressure sensitivity material of negative temperature coefficient, that is, to can reach temperature-compensating again
Effect.It is whole to have many advantages, such as flexible design, it is structurally reasonable.
4. touch control unit is driven with pressure sensitivity unit by same common driver 181, which save hardware cost, letters
Change circuit design, improved 10 integrated level of condenser type three-dimensional detecting module, and reduces condenser type three-dimensional to a certain extent
The thickness and weight of detecting module 10.
Referring to Fig. 7, second embodiment of the invention condenser type three-dimensional detecting module 20 and first embodiment condenser type are three-dimensional
Detecting module 10 the difference is that only: the first direction touch-driven electrode and second of the condenser type three-dimensional detecting module 20
Direction touch control receiving electrode (not shown) is arranged on different bearing beds, and the another piezoelectric pressure indicator 20s is not
It is that external hanging type is positioned at touch panel (not labeled), but is embedded in touch panel.Specifically, condenser type three-dimensional detecting module
20 include a capacitance touching control sensor 23, the capacitance touching control sensor 23 at least by the first touch control electrode layer 231 (including
A plurality of equidistant first direction touch-driven electrode disposed in parallel) and a second touch control electrode layer 232 (including it is a plurality of equidistantly
Second direction touch-control receiving electrode disposed in parallel) it is defined.The touch sensing 23 is embedded with piezoelectric pressure sensing
Device 20s, so far, condenser type three-dimensional detecting module 20 include upper substrate 21, laminating layer 22, the first touch control electrode layer from top to bottom
231, the first insulating layer 24, piezoelectric pressure indicator 20s, second insulating layer 24 ', second touch control electrode layer 232 and one letter
Number processing circuit 28.First insulating layer 24 is with second insulating layer 24 ' (being collectively referred to as insulating layer) respectively as the first touch control electrode layer 231
With the bearing bed of second touch control electrode layer 232, and risen between capacitance touching control sensor 23 and piezoelectric pressure indicator 20s
Insulating effect.Touch control unit has been defined between the first direction touch-driven electrode and second direction touch-control receiving electrode.
The piezoelectric pressure indicator 20s includes one first pressure sensitivity layer 25, a flexible substrate layer 26 and one second pressure
Feel layer 27, the first pressure sensitivity layer 25 and the second pressure sensitivity layer 27 are arranged in 26 two sides of flexible substrate layer and with flexible substrate layer 26
As bearing bed.An at least pressure sensitivity unit is respectively arranged on first pressure sensitivity layer 25 and the second pressure sensitivity layer 27.
In the present embodiment between 28 structure of three dimensional signal processing circuit and operation principles and pressure sensitivity unit and touch control unit
Method for detecting is consistent with principle, i.e., touch sensing 23 detects touch point position, piezoelectric pressure using mutual capacitance mode
Sensor 20s detects pressing force value using self-capacitance mode.
Referring to Fig. 8, third embodiment of the invention condenser type three-dimensional detecting module 40 and second embodiment condenser type are three-dimensional
Detecting module 20 the difference is that only: the insulating layer in the not set embodiment two of the condenser type three-dimensional detecting module 40, electricity
Appearance formula three-dimensional detecting module 40 successively includes a upper substrate 41, a laminating layer 42, a condenser type three-dimension sensor 40d from top to bottom
And a three dimensional signal processing circuit 48, the condenser type three-dimension sensor 40d include a piezoelectric pressure indicator 40s and
The one capacitance touching control sensor (not labeled) defined by the first touch control electrode layer 431 with second touch control electrode layer 432, piezoelectricity
Formula pressure sensor 40s includes the one first pressure sensitivity layer 45 and one second pressure sensitivity layer 47 that 46 two sides of flexible substrate layer are arranged in,
It is embedded in capacitance touching control sensor.The first pressure sensitivity layer 45 and the second pressure sensitivity layer 47 respectively with the first touch control electrode layer
431 and second touch control electrode layer 432 fit closely setting, be provided at least one on the first pressure sensitivity layer 45 and the second pressure sensitivity layer 47
Pressure sensitivity unit.It is respectively arranged on first touch control electrode layer 431 and second touch control electrode layer 432 a plurality of equidistant parallel
The first direction touch-driven electrode and second direction touch-control receiving electrode (figure does not regard) of setting, first direction touch-driven electrode
Touch control unit has been defined between second direction touch-control receiving electrode.
In the present solution, the first pressure sensitivity layer 45 and one second pressure sensitivity layer 47 of unpatterned processing utilize the first touch-control electricity
Pole layer 431 and second touch control electrode layer 432 act as export pressure signal conductive electrode (serve as pressure signal derived layer,
I.e. each pressure sensitivity unit of construction is the input electrode and output electrode of complete loops), the first pressure sensitivity layer 45 and one second pressure sensitivity layer
47 by fitting closely the first touch control electrode layer 431 of setting with it and second touch control electrode layer 432 conducts pressure signal
It goes out.Condenser type three-dimensional detecting module 40 can both detect touch point position in this way, can also be solved with the electrode of conducting pressure signal
The difficult problem of the bad caused pressure signal detecting of part piezoelectric material electric conductivity of having determined.
Fig. 8 please be cooperate referring again to Fig. 9, the three dimensional signal processor 48 includes a condenser type Three dimensions control device 480, this three
It is integrated on a chip to tie up touch controller 480, condenser type three-dimension sensor 40d is by same connection in condenser type Three dimensions control
The condenser type three-dimensional processor 489 of device 480.The condenser type Three dimensions control device 480 further comprises a common driver 481,
One driving pulse processing circuit 487 (including circuit 485 is reformed in a selection circuit 483 and a pulse), the selection circuit 483
It is connected to common driver 481 and all or part of selection can be carried out to the driving signal that common driver 481 is exported
After export to pulse and reform circuit 485, if having the design in deformation implementation need selection circuit 483 also can will part from public
The signal that driver 481 provides is conveyed directly to condenser type three-dimension sensor 40d, and the pulse reforms circuit 485 to received
Signal can be displaced, frequency dividing, export touch-control scanning pulse after the processing such as pulsewidth constriction or pressure scanning pulse is supplied to three
Tie up sensor 40d.
Referring to Fig. 10, It1 and It2 respectively represent the touching signals detecting timing of two different touch control units, it is described
Ifa_1 detects timing, Ifb_1 and Ifb_2 from the Ifa_2 pressure signal for representing two different pressure sensitivity units on the first pressure sensitivity layer 45
The pressure signal detecting timing for representing two different pressure sensitivity units on the second pressure sensitivity layer 47, is located at two difference on the first pressure sensitivity layer 45
Pressure sensitivity unit to be located at two different pressure sensitivity cell positions on the second pressure sensitivity layer 47 corresponding.Due to the first pressure sensitivity layer 45 and one
Two pressure sensitivity layers 47 are needed by fitting closely the first touch control electrode layer 431 of setting with it and second touch control electrode layer 432 (fills
When pressure signal derived layer) pressure signal is conducted to, therefore, the detecting of touch point position and the detecting point of pressure value size
Drive row into, and the condenser type Three dimensions control device 480 be first carry out touch point position detecting determine the position of touch point after,
Corresponding pressure sensitivity unit at corresponding touch point position is detected again.
Figure 11 is please referred to, as a kind of variant embodiment, the first pressure sensitivity layer 45 and the second pressure sensitivity layer 47 can also be into
The first touch control electrode layer 431 and second touch control electrode layer 432 that row patterned process and the pattern are fitted closely with it respectively
Pattern it is identical or corresponding.
The first touch control electrode layer 431 and second touch control electrode layer 432 preferably make of metal grill in the present embodiment, with
One touch control electrode layer 431 uses for for metal grill production, and the first touch control electrode layer 431, which is gone into battle, shows a plurality of first direction
Touch-driven electrode 4311 (Figure 12 bold portion), as shown in figure 12.
Compared with prior art, the first pressure sensitivity layer 45 and one second pressure sensitivity layer 47 are needed by fitting closely setting with it
First touch control electrode layer 431 and second touch control electrode layer 432 conduct pressure signal, are in this preferred embodiment
First pressure sensitivity layer 45 and one second pressure sensitivity layer 47 then no setting is required pressure-driven electrode and pressure receiving electrode (i.e. touch control unit with
Pressure sensitivity unit is in electrical contact, therefore touch control unit and pressure sensitivity units shared identical conduction route are electrically connected to condenser type three-dimensional process
Device 489), it can be significantly reduced the setting of route in this way.Also simplify manufacture craft.First touch control electrode layer 431 and second
Touch control electrode layer 432 selects metal grill production, with extraordinary electric conductivity, therefore, it can be preferably by pressure signal
Reliable export.
Figure 13 is please referred to, fourth embodiment of the invention provides a kind of method for detecting of condenser type three-dimensional detecting module, described
Condenser type three-dimensional detecting module can be any 10 (this of condenser type three-dimensional detecting module of the revealed embodiment of Fig. 1 to Figure 12
The label of mechanical components mentioned in embodiment please refers to embodiment one), the condenser type three-dimensional detecting module includes extremely
A few capacitance touching control sensor 13 and the integrated condenser type three on a chip of a piezoelectric pressure indicator 10s and one
D controller 180.
The method for detecting of condenser type three-dimensional detecting module includes the following steps:
S0: start；
S1: capacitance touching control sensor 13 adopts mutual capacitance mode and carries out detecting touch-control point to the multiple touch control unit
It sets；
Further comprise step after the touch point position determines:
S2: piezoelectric pressure indicator 10s, which picks up from capacitive way, carries out pressure signal to an at least pressure sensitivity unit
Detecting presses force value size to determine；The corresponding pressure sensitivity list in piezoelectric pressure indicator 10s detecting touch point position place
Member；Starting point and knot of the starting point and end point in the detecting period of the touching signals with the pressure signal detecting period
Beam spot dislocation.
S3: condenser type three-dimensional detecting module 10 responds；Condenser type three-dimensional detecting module 10 determine touch point position with
And corresponding response action is made after pressing force value, such as jumping for display interface, sliding etc..
S4: terminate.
Touching signals caused by the capacitance touching control sensor 13 and the piezoelectric pressure indicator 10s are produced
Raw pressure signal carries out calculation process by the condenser type Three dimensions control device 180.
Preferably, in step s 2, the corresponding pressure sensitivity unit in detecting touch point position place includes at least two pressure sensitivity units,
At least two pressure sensitivity units are located at the two sides of same flexible substrate layer.
Figure 14 is please referred to, fifth embodiment of the invention provides a kind of method for detecting of condenser type three-dimensional detecting module, described
Condenser type three-dimensional detecting module can be (this of any condenser type three-dimensional detecting module 10 of embodiment disclosed in Fig. 1 to Figure 12
The label of mechanical components mentioned in embodiment please refers to embodiment one), the condenser type three-dimensional detecting module includes extremely
A few capacitance touching control sensor 13 and a piezoelectric pressure indicator 10s and a condenser type Three dimensions control device 180.
The method for detecting of condenser type three-dimensional detecting module includes the following steps:
T0: start；
T21: capacitance touching control sensor carries out touching signals to the multiple touch control unit using mutual capacitance mode and detects
It surveys to determine touch point position；
T22: piezoelectric pressure indicator carries out pressure signal to an at least pressure sensitivity unit using self-capacitance mode
Detecting presses force value size to determine；The corresponding pressure sensitivity list in piezoelectric pressure indicator 10s detecting touch point position place
Member；
The detecting of step touch point position and the pressing force value size are carried out with timing or timesharing sequence independently of one another.
T3: condenser type three-dimensional detecting module response；Condenser type three-dimensional detecting module determine touch point position and by
Corresponding response action is made after pressure value, such as jumping for display interface, sliding etc..
T4: terminate.
Preferably, in step T22, the corresponding pressure sensitivity unit in detecting touch point position place includes at least two pressure sensitivity lists
Member, at least two pressure sensitivity units are located at the two sides of same flexible substrate layer.The foregoing is merely preferable realities of the invention
Example is applied, is not intended to limit the invention, all any modifications made within principle of the invention, equivalent replacement and improvement
Etc. should all be comprising within protection scope of the present invention.
Claims (8)
1. a kind of method for detecting of condenser type three-dimensional detecting module, it is characterised in that: provide a condenser type three-dimensional detecting module, institute
Stating condenser type three-dimensional detecting module includes that a capacitance touching control sensor and a piezoelectric pressure indicator and one are integrated in one
Condenser type Three dimensions control device on chip, the capacitance touching control sensor include multiple touch control units, the piezoelectric pressure
Sensor include an at least pressure sensitivity unit, the method for detecting successively comprising steps of
S1: mutual capacitance mode is used to carry out the detecting of touching signals to the multiple touch control unit to determine touch point position；And
S2: self-capacitance mode is used to carry out the detecting of pressure signal to an at least pressure sensitivity unit to determine that pressing force value is big
Small, an at least pressure sensitivity unit is corresponding with touch point position identified in step S1 in this step；
The touching signals and the pressure signal are by condenser type Three dimensions control device progress calculation process, the touch-control letter
Number detecting the period starting point and end point with the pressure signal detecting period starting point and end point misplace, it is described
Piezoelectric pressure indicator includes the first pressure sensitivity layer and the second pressure sensitivity layer, and the first pressure sensitivity layer is the pressure using positive temperature coefficient
Feel positive temperature coefficient pressure sensitivity layer made of material, the second pressure sensitivity layer is negative made of the pressure sensitivity material using negative temperature coefficient
Temperature coefficient pressure sensitivity layer, the pressure signal of pressure sensitivity unit is as pressure sensitivity unit on the first pressure sensitivity layer on the second pressure sensitivity layer
Pressure signal temperature-compensating object.
2. the method for detecting of condenser type three-dimensional detecting module as described in claim 1, it is characterised in that: an at least pressure sensitivity
Unit is correspondingly arranged with multiple touch control unit positions.
3. a kind of method for detecting of condenser type three-dimensional detecting module, it is characterised in that: provide a condenser type three-dimensional detecting module, institute
Stating condenser type three-dimensional detecting module includes that a capacitance touching control sensor and a piezoelectric pressure indicator and one are integrated in one
Condenser type Three dimensions control device on chip, the capacitance touching control sensor include multiple touch control units, the piezoelectric pressure
Sensor include an at least pressure sensitivity unit, the method for detecting comprising steps of
T21: mutual capacitance mode is used to carry out the detecting of touching signals to the multiple touch control unit to determine touch point position；And
T22: self-capacitance mode is used to carry out the detecting of pressure signal to an at least pressure sensitivity unit to determine that pressing force value is big
It is small；
Step T21 and step T22 are carried out independently of each other；
The touching signals and the pressure signal are by condenser type Three dimensions control device progress calculation process, the touch-control letter
Number detecting the period starting point and end point with the pressure signal detecting period starting point and end point misplace, it is described
Piezoelectric pressure indicator includes the first pressure sensitivity layer and the second pressure sensitivity layer, and the first pressure sensitivity layer is the pressure using positive temperature coefficient
Feel positive temperature coefficient pressure sensitivity layer made of material, the second pressure sensitivity layer is negative made of the pressure sensitivity material using negative temperature coefficient
Temperature coefficient pressure sensitivity layer, the pressure signal of pressure sensitivity unit is as pressure sensitivity unit on the first pressure sensitivity layer on the second pressure sensitivity layer
Pressure signal temperature-compensating object.
4. the method for detecting of condenser type three-dimensional detecting module as claimed in claim 3, it is characterised in that: the touching signals
Detecting and the detecting timesharing sequence of the pressure signal carry out.
5. the method for detecting of condenser type three-dimensional detecting module as claimed in claim 3, it is characterised in that: the touching signals
Detecting and the detecting of the pressure signal are carried out with timing.
6. the method for detecting of condenser type three-dimensional detecting module as claimed in claim 3, it is characterised in that: an at least pressure sensitivity
Unit is correspondingly arranged with multiple touch control unit positions.
7. the method for detecting of condenser type three-dimensional detecting module as claimed in claim 3, it is characterised in that: the piezoelectric pressure
Sensor includes an at least flexible substrate layer, and the first pressure sensitivity layer and described is respectively set in the two sides of the flexible substrate layer
Second pressure sensitivity layer.
8. the method for detecting of condenser type three-dimensional detecting module as claimed in claim 7, it is characterised in that: the condenser type is three-dimensional
Controller believes the pressure of pressure sensitivity unit on the pressure signal and the second pressure sensitivity layer of pressure sensitivity unit on the first pressure sensitivity layer
It number is overlapped.
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| CN201510639990.8A CN106557213B (en) | 2015-09-30 | 2015-09-30 | A kind of method for detecting of condenser type three-dimensional detecting module |
| TW105126936A TWI614663B (en) | 2015-09-30 | 2016-08-23 | Touch detection method of capacitive 3d detection module |
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| CN111399686B (en) * | 2020-03-27 | 2025-02-18 | 宸鸿科技(厦门)有限公司 | A three-dimensional touch module and detection method thereof |
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| TW201205404A (en) * | 2010-07-16 | 2012-02-01 | Elan Microelectronics Corp | Three-dimensional touch sensor and application thereof |
| CN102339179A (en) * | 2010-07-16 | 2012-02-01 | 义隆电子股份有限公司 | Three-dimensional touch sensor and application method thereof |
| TWI448935B (en) * | 2011-05-20 | 2014-08-11 | Nat Univ Tsing Hua | 3-d touch sensor and 3-d touch panel |
| TWI491859B (en) * | 2013-05-24 | 2015-07-11 | Himax Tech Ltd | Method of detecting touch force and detector |
| CN203858612U (en) * | 2013-08-29 | 2014-10-01 | 福建省辉锐材料科技有限公司 | Transparent piezoelectric plate and touch panel |
| CN104423740B (en) * | 2013-08-30 | 2018-07-13 | 唐山东唐电气股份有限公司 | Method for sensing based on capacitive touch device |
| TW201516806A (en) * | 2013-10-16 | 2015-05-01 | Acer Inc | Three-dimension touch apparatus |
| CN203630766U (en) * | 2013-12-11 | 2014-06-04 | 深圳市宇顺电子股份有限公司 | 3d display capacitive touch screen module |
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