CN205809842U - Pressure-detecting device, touch control device and electric terminal - Google Patents
Pressure-detecting device, touch control device and electric terminal Download PDFInfo
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- CN205809842U CN205809842U CN201620582245.4U CN201620582245U CN205809842U CN 205809842 U CN205809842 U CN 205809842U CN 201620582245 U CN201620582245 U CN 201620582245U CN 205809842 U CN205809842 U CN 205809842U
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Abstract
This utility model embodiment provides a kind of pressure-detecting device, touch control device and electric terminal, device includes: the first detection electric capacity, for carrying out difference processing to eliminate the second detection electric capacity of interference signal with the capacitance of described first detection electric capacity, first detection electric capacity includes pressure detecting electrode, second detection electric capacity includes with reference to detecting electrode, described pressure detecting electrode is arranged in the same face with reference to detecting electrode with described, make to be coupled with, on described first detection electric capacity and the second detection electric capacity, the described interference signal that pressure detecting is formed interference simultaneously, described first detection electric capacity and the second capacitance detecting electric capacity are being carried out difference processing, thus eliminate including the interference interference signal that causes of signal such as display device, add the sensitivity of pressure detecting.Meanwhile, owing to the variations in temperature of pressure-detecting device is fed back on the first detection electric capacity and the second detection electric capacity simultaneously, the capacitance of the first detection electric capacity and the second detection electric capacity being carried out difference processing, this impact is cancelled out each other, thus inhibits temperature drift.
Description
Technical field
This utility model embodiment relates to technical field of touch control, particularly relate to a kind of pressure-detecting device, touch control device and
Electric terminal.
Background technology
Touch technology is such as applied on intelligent terminal, as long as user can be allowed can to realize terminal by gesture operation
Operation, has broken away from traditional mechanical keyboard, has made man-machine interaction the most simple and direct.
But, as a example by the development of touch technology, such as capacitance touching control, simple finger touch can not meet use
The demand of family more various dimensions input, adding pressure sensing technologies (Force Touch) in capacitance touch screen can increase by one
Input dimension, allow touch screen can perception finger pressure information, perception is gently pressed and the dynamics of weight, and is recalled different correspondences
Function, thus better Consumer's Experience is provided.Such as in the pressure sensing technologies of touch screen, generally pass through induction apparatus
Sensor detects the change of effective direct-to-ground capacitance, is implemented in combination in touch-control with display device and shows.
In prior art one situation, the center upper surface of equipment arranges one layer of OCA glue, at this layer of OCA glue upper surface
Arranging pressure detecting electrode, pressed by finger, effective direct-to-ground capacitance of pressure detecting electrode can become big, concrete, because
Pressure detecting electrode is diminished by pressing in one's hands relative to the distance of the common reference electrode layer (Vcom layer) in display device, makes
Effective direct-to-ground capacitance is become to become big.
In an other situation of prior art, one layer of OCA glue is set at display device lower surface, at this layer of OCA glue
Lower surface arranges pressure detecting electrode, and pressure detecting electrode is diminished by pressing in one's hands relative to the distance of mobile phone center, causes
Effectively direct-to-ground capacitance becomes big.The pressure that just can be calculated finger pressing by the change size detecting effective direct-to-ground capacitance is big
Little.
But, there is also another load direct-to-ground capacitance, this load direct-to-ground capacitance be formed at pressure detecting electrode and center it
Between, the detection of effective direct-to-ground capacitance can be adversely affected by this load direct-to-ground capacitance, brings interference to effective direct-to-ground capacitance.Separately
Outward, the existence of display device brings interference to effective direct-to-ground capacitance.Therefore, these interference can be to effective Capacitive current measuring
Sensitivity adversely affects, and reduce further the sensitivity of pressure detecting.
In order to solve the interference that wherein display device brings, prior art increases by one layer of screen layer and solves, this screen layer
It is arranged between display device and pressure detecting electrode, but is to increase one layer of screen layer and can cause the increase of cost, and make to show
Display screen entirety is thickening.And to wherein loading the interference prior art solution technology that offer is not relevant that direct-to-ground capacitance brings
Scheme.
Utility model content
The purpose of this utility model embodiment is to provide a kind of pressure-detecting device, touch control device and electric terminal, uses
At least to solve the problems referred to above of the prior art.
For realizing the purpose of this utility model embodiment, this utility model embodiment provides a kind of pressure-detecting device,
It includes the first detection electric capacity, for carrying out difference processing to eliminate interference signal with the capacitance of described first detection electric capacity
Second detection electric capacity, the first detection electric capacity includes that pressure detecting electrode, the second detection electric capacity include with reference to detecting electrode, described pressure
Power detecting electrode is arranged in the same face with reference to detecting electrode with described so that described first detection electric capacity and the second detection electric capacity
Upper being simultaneously coupled with forms, to pressure detecting, the described interference signal disturbed.
This utility model embodiment also provides for a kind of touch control device, and it includes any one pressure in this utility model embodiment
Force checking device.
This utility model embodiment also provides for a kind of electric terminal, and it includes that any one in this utility model embodiment is touched
Control equipment.
In this utility model embodiment, owing to the first detection electric capacity includes described pressure detecting electrode, the second detection electric capacity
Including described with reference to detecting electrode, described pressure detecting electrode is arranged in the same face with reference to detecting electrode with described so that right
The interference signal of pressure detecting is coupling on described first detection electric capacity and the second detection electric capacity simultaneously, to pressure detecting time institute
State the capacitance of the first detection electric capacity and the second detection electric capacity when carrying out difference processing thus eliminate including interference letter
Number interference signal caused such as display device, adds the sensitive of pressure detecting on the premise of need not to increase the thickness of product
Degree.
Meanwhile, when variations in temperature occurs, on the one hand, owing to being arranged in reference to detecting electrode and pressure detecting electrode
In the same face, each other close together, still further aspect feed back at the first detection electric capacity due to this variations in temperature simultaneously and
On second detection electric capacity, the impact that the first detection electric capacity and the second detection electric capacity are caused by variations in temperature is suitable, when carrying out difference
Processing, this impact is cancelled out each other, thus is inhibited temperature drift.
Accompanying drawing explanation
Fig. 1 is the floor map of this utility model embodiment one pressure-detecting device；
Fig. 2 is the floor map of this utility model embodiment two pressure-detecting device；
Fig. 3 is the floor map of this utility model embodiment three pressure-detecting device；
Fig. 4 is the structural representation of this utility model embodiment four pressure-detecting device；
Fig. 5 is the structural representation of this utility model embodiment five pressure-detecting device；
Fig. 6 is the equivalent circuit structure schematic diagram of this utility model embodiment six pressure-detecting device；
Fig. 7 is the structural representation of this utility model embodiment seven pressure-detecting device；
Fig. 8 is the equivalent circuit structure schematic diagram of this utility model embodiment eight pressure-detecting device；
Fig. 9 is the structural representation of this utility model embodiment nine difference channel；
Figure 10 is this utility model embodiment ten pressure detection method schematic flow sheet.
Detailed description of the invention
Describe presently filed embodiment in detail below in conjunction with graphic and embodiment, thereby how the application is applied
Technological means solves technical problem and reaches the process that realizes of technology effect and can fully understand and implement according to this.
Main thought in the following embodiment of this utility model is, pressure-detecting device includes the first detection electric capacity, use
Difference processing is carried out to eliminate the second detection electric capacity of interference signal, the first detection in the capacitance with described first detection electric capacity
Electric capacity includes that pressure detecting electrode, the second detection electric capacity include with reference to detecting electrode, described pressure detecting electrode and described reference
Detecting electrode is arranged in the same face so that is coupled with on described first detection electric capacity and the second detection electric capacity simultaneously and examines pressure
Survey the described interference signal forming interference.
The following embodiment of this utility model, enters the technical solution of the utility model as a example by the interference that display device causes
Row is explained, it should be understood that, it is also possible to there are other interference sources, repeat no more in detail.
In the following embodiment of this utility model, owing to described pressure detecting electrode is arranged on same with described reference detecting electrode
In one side so that the interference signal of pressure detecting is coupling on described first detection electric capacity and the second detection electric capacity simultaneously,
The capacitance of the first detection electric capacity described in during pressure detecting and the second detection electric capacity carries out difference processing, thus eliminates and wherein wrap
The interference signal that the interference signal such as display device included causes, adds pressure on the premise of the thickness that need not increase product
The sensitivity of detection.
Meanwhile, when occurring that pressure-detecting device causes variations in temperature due to energising, on the one hand, due to reference to detection
Electrode and pressure detecting electrode are arranged in the same face, each other close together, on the other hand due to this variations in temperature with
In time, feed back on the first detection electric capacity and the second detection electric capacity, and the first detection electric capacity and the second detection electric capacity are caused by variations in temperature
Impact suitable, when carrying out difference processing, this impact is cancelled out each other, thus inhibits temperature drift.
Such as, Cx represents the first detection electric capacity, and Cref represents the second detection electric capacity, it is assumed that temperature is T1 when, Cx-
Cref=Δ C；The when that variations in temperature being T2, Cx and Cref can change, respectively Cx+ Δ Cx and Cref+ Δ Cref, then
Due to Cx and Cref electrode very close to, so Δ Cx ≈ Δ Cref, therefore, Cx+ Δ Cx-(Cref+ Δ Cref)=Cx+-
Cref+ (Δ Cx-Δ Cref) ≈ Δ C, thus temperature drift is had the strongest rejection ability.
Fig. 1 is the floor map of this utility model embodiment one pressure-detecting device；As it is shown in figure 1, with reference to detection electricity
Pole 101 and pressure detecting electrode 102 are positioned at the same face, and multiple pressure detecting electrodes form a pressure detecting electrod-array, ginseng
Examine detecting electrode and be arranged on the periphery of pressure detecting electrod-array.In the present embodiment, the quantity of reference detecting electrode 101 is 1,
And to there being 9 pressure detecting electrodes 102, this reference detecting electrode 101 is the annular electrode of a rectangular shape, around 9 pressures
The pressure detecting electrod-array of power detecting electrode 102.
Fig. 2 is the floor map of this utility model embodiment two pressure-detecting device；Different from above-described embodiment one
It is to be a rectangular electrode with reference to detecting electrode 101, is positioned at the pressure detecting electrod-array of 9 pressure detecting electrodes 102 formation
The upper right corner.
Fig. 3 is the floor map of this utility model embodiment three pressure-detecting device；Different from above-described embodiment one
It is to be a strip shaped electric poles with reference to detecting electrode 101, is positioned at the pressure detecting electrod-array of 9 pressure detecting electrodes 102 formation
Top.
The being diagrammatically only by property of embodiment of above-mentioned Fig. 1-Fig. 3 illustrate one with reference to detecting electrode corresponding multiple pressure detecting electricity
Pole, but it is also possible to by multiple with reference to the corresponding multiple pressure detecting electrodes of detecting electrode.
With reference to the shape of detecting electrode with arrange position and be not limited to above-mentioned Fig. 1-Fig. 3 particular condition, it is possibility to have other
Situation.Such as, with reference to detecting electrode be shaped as rectangle, circle, ellipse, trapezoidal, strip or any regular or irregular component
Shape.Such as in view of doing Differential Detection when, with reference to detecting electrode, the impact of pressure detecting electrode will be minimized, institute
State the capacitance capacitance more than described second detection electric capacity of the first detection electric capacity, such as by by the face with reference to detecting electrode
The long-pending area being designed to specific pressure detecting electrode is smaller to be realized.
With reference to detecting electrode arrange position can be arranged on pressure detecting electrod-array periphery such as Fig. 1-Fig. 3 enforcement
Example, in other embodiments, it is also possible in arbitrary corner location, arbitrary edge placement, multiple corner location, position, multiple edge
Put.When being arranged on periphery, during due to pressure-detecting device stress and deformation, the second detection electric capacity deformation formed with reference to detecting electrode
Relatively small, therefore, can be equal with the area of pressure detecting electrode with reference to detecting electrode.
It addition, the centre of pressure detecting electrod-array can also be arranged on reference to detecting electrode, such as intert be arranged on many
In individual pressure detecting electrode, such as, first row pressure detecting electrode 102 and second row pressure detecting in Fig. 1-Fig. 3 embodiment
One is arranged with reference to detecting electrode, second row pressure detecting electrode 102 and the 3rd row pressure power detecting electrode 102 between electrode 102
Between another one detecting electrode is set, now, the single area with reference to detecting electrode is preferably smaller than single pressure detecting electrode
Area so that minimum on the impact of pressure detecting electrode with reference to detecting electrode.
In above-mentioned Fig. 1-Fig. 3, the horizontal layout schematic diagram with reference to detecting electrode with pressure detecting electrode had both gone for certainly
Capacitance detecting, it is also possible to be applicable to mutual capacitance detection.
Fig. 4 is the structural representation of this utility model embodiment four pressure-detecting device；As shown in Figure 4, in the present embodiment,
As a example by self-capacitance detects, pressure detecting electrode 102 couples with the first conducting surface 103 and the second conducting surface 104 respectively, respectively shape
Becoming first effectively to detect electric capacity 105 and the first load detecting electric capacity 106, the first detection electric capacity includes that first effectively detects electric capacity
105 and the first load detecting electric capacity 106, the first effectively detection electric capacity 105 and the first load detecting electric capacity 106 is connected；With reference to inspection
Survey electrode 101 to couple with the first conducting surface 103 and the second conducting surface 104 respectively, form second and effectively detect electric capacity 107 and second
Load detecting electric capacity 108, the second detection electric capacity includes the second effectively detection electric capacity 107 and the second load detecting electric capacity 108, second
Effectively detection electric capacity 107 and the second load detecting electric capacity 108 is connected.
In the present embodiment, the first conducting surface 103 is common reference electrode, and common reference electrode is display device 109 and pressure
Power detecting electrode 102 shares, and owing to being self-capacitance detection, therefore, pressure detecting electrode 102 need to receive pumping signal TX.Second
Conducting surface 104 is the conduction center of the terminal including pressure-detecting device.
In the present embodiment, being provided with OCA glue 111 inside conduction center 104, the upper surface on OCA glue 111 is adhesive with pressure
Power detecting electrode 102.The terminal being provided with described pressure-detecting device includes described display device 109, described display device 109
And forming a gap 110 between pressure detecting electrode 102, when cover plate 113 pressurized, the size in this gap 110 becomes along with pressure
Change and change, and then cause the capacitance of the first detection electric capacity and the second detection electric capacity to change.
It should be noted that in other embodiments, the second conducting surface 104 can also be the terminal of pressure-detecting device
Conduction shell on the back, the most no longer accompanying drawing explanation.
In other embodiments, described first conducting surface is common reference electrode, and the second conducting surface can be from described pressure
Force checking device, terminal conductive structure in select, or, the second conducting surface is the conduction of the terminal of described pressure-detecting device
Shell on the back or conduction center, and described first conducting surface from pressure-detecting device, terminal conductive structure select.
Fig. 5 is the structural representation of this utility model embodiment five pressure-detecting device；As it is shown in figure 5, in the present embodiment,
Still explanation as a example by self-capacitance detects.
Unlike the embodiments above, the first conducting surface 103 is the conduction center of the terminal including pressure-detecting device,
Second conducting surface 104 is common reference electrode.I.e. in the present embodiment, pressure detecting electrode 102 respectively with as the first conducting surface
The conduction center of 103 and the common reference electrode as the second conducting surface 104 couple, and form first respectively and effectively detect electric capacity
105 and the first load detecting electric capacity 106, the first detection electric capacity includes the first effectively detection electric capacity 105 and the first load detecting electricity
Holding 106, the first effectively detection electric capacity 105 and the first load detecting electric capacity 106 is connected；With reference to detecting electrode 101 respectively with conduct
The conduction center of the first conducting surface 103 and the common reference electrode as the second conducting surface 104 couple, and form second and effectively detect
Electric capacity 107 and the second load detecting electric capacity 108, the second detection electric capacity includes the second effectively detection electric capacity 107 and the second load inspection
Surveying electric capacity 108, the second effectively detection electric capacity 107 and the second load detecting electric capacity 108 is connected.
In the present embodiment, the lower surface of display device 109 is provided with OCA glue 111, and the lower surface on OCA glue 111 is pasted
There is pressure detecting electrode 102, between pressure detecting electrode 102 and conduction center, form a gap 110, when cover plate 113 pressurized,
The size in this gap 110, along with change in pressure, causes the capacitance of the first detection electric capacity and the second detection electric capacity to occur
Change.
It should be noted that in other embodiments, the first conducting surface 103 can also be the terminal of pressure-detecting device
Conduction shell on the back, the most no longer accompanying drawing explanation.
Fig. 6 is the equivalent circuit structure schematic diagram of this utility model embodiment six pressure-detecting device；As shown in Figure 6,
One detection electric capacity 100 is connected with the positive input Vin+ of difference channel, and the second detection electric capacity 200 is the most defeated with difference channel
Entering and hold Vin-to connect, this difference channel can be realized by fully-differential amplifier, it is possible to is realized by two-way single-ended amplifier, the most not
Repeat again.Fully-differential amplifier can preferably suppress common-mode noise.
In the present embodiment, display device 109 forms first with the first conducting surface and couples electric capacity 100A, display device and second
Conducting surface forms the second coupling electric capacity 200A, and when pressure detecting, first couples the electricity of electric capacity 100A and second coupling electric capacity 200A
Capacitance is identical, and the first coupling electric capacity 100A and the first detection electric capacity 100 are connected, the second coupling electric capacity 200 and the second detection electric capacity
200A connects so that the interference signal of pressure detecting is coupling in the first detection electric capacity 100 and the second detection electric capacity 200 simultaneously
On.Couple the interference voltage Vn's from display device by the first coupling electric capacity 100A and the second coupling electric capacity 200A simultaneously
Interference, owing to the capacitance of the first coupling electric capacity 100A and the second coupling electric capacity 200A is identical, therefore, is carried out at difference follow-up
During reason, this interference is eliminated.
In the present embodiment, described first detection electric capacity 100 is electrically connected with the first tunable capacitor 100C, described second detection electricity
Hold 200 and be electrically connected with the second tunable capacitor 200C, according to described first tunable capacitor 100C, described second tunable capacitor 200C
Regulation, adjust described first detection electric capacity 100 and adjust described first inspection when pressure detecting with described second detection electric capacity 200
Survey the size matching relationship of the capacitance of electric capacity and described second detection electric capacity, including the electric capacity adjusting described first detection electric capacity
It is worth greater than, equal to or is less than the capacitance of described second detection electric capacity.In other embodiments, described in being configured with the most simultaneously
First tunable capacitor 100C, described second tunable capacitor 200C, it is also possible to select one and configure.
Specifically, the capacitance design that design detects electric capacity first is slightly larger, when finger pressing causes the first detection
The when that the capacitance of electric capacity and the second detection electric capacity becoming big, circuit can obtain a positive voltage output, pressure calculation unit
Calculate the size of pressure according to positive voltage size, thus realize pressure sensitive.Meanwhile, by the first tunable capacitor 100C and/
Or the second tunable capacitor 200C so that when not having pressure, difference channel is output as 0.Such as, tunable capacitor is individually regulated
100C, and/or, it is contemplated that rigging error that may be present, regulate the second tunable capacitor 200C, so that there is no pressure simultaneously
Time, difference channel is output as 0.
In the present embodiment, alternatively, described first detection electric capacity 100 electrically connects with the first on-off circuit 100B, and/or,
Second detection electric capacity 200 electrically connects with second switch circuit 200B, to pass through the first on-off circuit 100B pair when pressure detecting
Described first detection electric capacity 100 is charged or discharge process, by second switch circuit 200B respectively to the second detection electric capacity
200 are charged or discharge process.
In the present embodiment, alternatively, described forward end electrical connection the 3rd on-off circuit 100D, described backward end electrical connection the
Four on-off circuit 200D, described first detection electric capacity is electrically connected with described forward end by described 3rd on-off circuit 100D, institute
State the second detection electric capacity to be electrically connected with described backward end by the 4th on-off circuit 200D.
First on-off circuit 100B, second switch circuit 200B close, the 3rd on-off circuit 100D, the 4th on-off circuit
200D disconnects, and charges to Vtx for described first detection electric capacity 100, second is detected electric capacity 200；First on-off circuit 100B,
Two on-off circuit 200B disconnect, the 3rd on-off circuit 100D, the 4th on-off circuit 200D Guan Bi, described first detection electric capacity 100,
Second detection electric capacity 200 enters discharge condition, now, owing to making the capacitance of the first detection electric capacity more than second when design
The capacitance of detection electric capacity, therefore, when there is not pressure, by regulating the first tunable capacitor 100C and the second tunable capacitor
200C so that difference channel is output as 0；When carrying out pressure detecting with the presence of pressure, the capacitance of the first detection electric capacity becomes
Changing the capacitance variation more than the second detection electric capacity, so that the voltage that difference channel output is positive, pressure calculation unit can root
The size of pressure is calculated, it is achieved pressure sensitive according to positive voltage size.
It should be noted that the electricity of electric capacity the capacitance of the first detection electric capacity can also be detected less than second when design
Capacitance, and by the first tunable capacitor and/or the adjustment of the second tunable capacitor, when pressure detecting, defeated according to difference channel
The negative voltage gone out calculates pressure size, the most no longer accompanying drawing explanation.
It should be noted that in other embodiments, above-mentioned first on-off circuit 100B, second switch circuit 200B,
The structure that one tunable capacitor 100C, the second tunable capacitor 200C need not necessarily include for pressure-detecting device, it is also possible to independent
In pressure-detecting device, not included by pressure-detecting device.In other embodiments, it is configured with the first switch electricity the most simultaneously
Road 100B, second switch circuit 200B, the first tunable capacitor 100C, the second tunable capacitor 200C, it is also possible to according to actual requirement
Select one to configure.
Fig. 7 is the structural representation of this utility model embodiment seven pressure-detecting device；As it is shown in fig. 7, the present embodiment with
Illustrating as a example by mutual capacitance detection, pressure-detecting device also includes pressure-driven electrode 112.
In the present embodiment, pressure detecting electrode 102 couples with pressure-driven electrode 112, forms first effective mutual capacitance, the
One effective mutual capacitance is as the first detection electric capacity 100；Couple with pressure-driven electrode 112 with reference to detecting electrode 101, form second
Effectively mutual capacitance, second effective mutual capacitance is as the second detection electric capacity 200.
Unlike the embodiments above, at display device 109 lower surface, one stressor layer drive electrode 112, this layer are set
Gap 110 is formed between pressure-driven electrode 112 and pressure detecting electrode 102.
It should be noted that position is set can the exchanging of above-mentioned pressure detecting electrode and pressure-driven electrode, corresponding,
As long as ensureing pressure detecting electrode and being arranged in the same face with reference to detecting electrode, the most no longer accompanying drawing explanation.
It addition, in the present embodiment, illustrate as a example by two-layer electrode i.e. pressure-driven electrode and pressure detecting electrode, when
Time scheme of the present utility model is applied to more layers electrode, as long as ensureing pressure detecting electrode and arranging with reference to detecting electrode
In the same face, the most no longer accompanying drawing explanation.
Fig. 8 is the equivalent circuit structure schematic diagram of this utility model embodiment eight pressure-detecting device；As shown in Figure 8, with
Unlike above-mentioned embodiment illustrated in fig. 6, for the situation of Fig. 7 in the present embodiment, tunable capacitor 100C and 200C is directly connected across
At the first detection electric capacity 100 and two ends of the second detection electric capacity 200, the first detection electric capacity 100 and the second detection electric capacity 200 are respectively
Being mutual capacitance rather than self-capacitance, the first coupling electric capacity 100A, the second coupling electric capacity 200A are respectively coupled to the first detection electric capacity
100, the second detection electric capacity 200A is near the side of difference channel input.
Fig. 9 is the structural representation of this utility model embodiment nine difference channel；As it is shown in figure 9, it may include that TIA
Circuit, for realizing the capacitive differential conversion to voltage difference, LPF is low-pass filter circuit, believes for filtered voltage difference
Interference in number, the capacity of resisting disturbance of intensifier circuit；INT circuit, for by less voltage difference signal integration Cheng Geng great 's
Voltage difference signal, improves SNR；Adc circuit, for realizing the digital quantization of voltage difference signal, in order to calculation of pressure module
Calculation of pressure is carried out based on voltage difference digital signal.
Figure 10 is this utility model embodiment ten pressure detection method schematic flow sheet；As shown in Figure 10, in the present embodiment,
Pressure detecting electrode and reference detecting electrode are arranged in the same face, and the interference signal of pressure detecting is coupling in the first inspection simultaneously
Survey on electric capacity and the second detection electric capacity, specifically, such as form the first coupling electric capacity by display device and the first conducting surface, aobvious
Show that equipment and the second conducting surface form the second coupling electric capacity, the first coupling electric capacity and the first detection capacitances in series, the second coupling electricity
Hold with second detection capacitances in series, when pressure detecting first couple electric capacity and second coupling electric capacity capacitance identical so that
The interference signal of pressure detecting must be coupling in simultaneously on the first detection electric capacity and the second detection electric capacity.Self-capacitance detection is come
Saying, in the present embodiment, the first conducting surface, the setting of the second conducting surface are referred to the embodiment shown in above-mentioned Fig. 4 or Fig. 5, in detail
Carefully repeat no more.For mutual capacitance detects, the first conducting surface, the setting of the second conducting surface are referred to the reality shown in Fig. 7
Execute example, repeat no more in detail.
In the present embodiment, detection method specifically includes following steps:
S1001, detection include the first detection electric capacity of pressure detecting electrode and include the second detection with reference to detecting electrode
The capacitance of electric capacity, described pressure detecting electrode and described reference detecting electrode are arranged in the same face so that the first detection electricity
Hold and be coupled with, on the second detection electric capacity, the interference signal that pressure detecting is formed interference simultaneously；
In the present embodiment, for self-capacitance detects, this step S1001 may include that
S1011A, detection pressure detecting electrode couples the first effective of formation respectively with the first conducting surface and the second conducting surface
Detection electric capacity and the capacitance of the first load detecting electric capacity, the first detection electric capacity includes the first effectively detection electric capacity and the first load
Detection electric capacity；
In the present embodiment, described first effectively detects electric capacity and the first load detecting capacitances in series.
It is effective that S1021A, detection couple second formed respectively with reference to detecting electrode with the first conducting surface and the second conducting surface
Detection electric capacity and the capacitance of the second load detecting electric capacity, the second detection electric capacity includes the second effectively detection electric capacity and the second load
Detection electric capacity.
In the present embodiment, second effectively detects electric capacity and the second load detecting capacitances in series.
For mutual capacitance detects, step S1001 may include that
S1011B, detection pressure detecting electrode couple the electric capacity of the first effective mutual capacitance formed with pressure-driven electrode
Value, first effective mutual capacitance is as the first detection electric capacity；
S1021B, detection couple the electric capacity of the second effective mutual capacitance formed with reference to detecting electrode with pressure-driven electrode
Value, second effective mutual capacitance is as the second detection electric capacity.
S1002, basis detect the capacitance of electric capacity and the second detection electric capacity and carry out difference processing during pressure detecting first
Eliminate described interference signal to determine the size of pressure.
In the present embodiment, step S1002 specifically can be by the forward end electricity of described first detection electric capacity with difference channel
Connecting, described second detection electric capacity electrically connects with the backward end of difference channel, with to described first detection electric capacity and the second detection
The capacitance of electric capacity carries out difference processing.Specifically, the most described first detection electric capacity by the 3rd on-off circuit with described just
To end electrical connection, described forward end electrically connects described 3rd on-off circuit, and described second detection electric capacity is by the 4th on-off circuit
Electrically connecting with described backward end, described backward end electrically connects described 4th on-off circuit, with to described first detection electric capacity and the
The capacitance of two detection electric capacity carries out difference processing.
When difference processing, if having N number of with reference to detecting electrode, M pressure detecting electrode, it is whole that N and M is more than 0
Number, then:
(1) N=1, M > 1, time, the first detection electric capacity that multiple pressure detecting electrodes are corresponding detects with this reference one by one
The second detection electric capacity that electrode is corresponding carries out mathematic interpolation；
(2) N=2, M > 1, the most N number of second detection electric capacity corresponding with reference to detecting electrode is N number of with M pressure detecting electrode
The first detection electric capacity that pressure detecting electrode is corresponding carries out difference process, to completing M the first inspection corresponding to pressure detecting electrode
The difference surveying electric capacity processes.
(3) during N=M, the corresponding reference detecting electrode of the most each pressure detecting electrode, the most now, M pressure detecting electricity
The first extremely corresponding detection electric capacity carries out man-to-man capacitive differential process respectively with N number of pressure sensing capacitance.
In the present embodiment, when pressure detecting by on-off circuit to described first detection electric capacity and/or the second detection electricity
Hold and be charged or discharge process, about on-off circuit, the discharge and recharge of the first detection electric capacity, the second detection electric capacity is processed, refer to
Embodiment illustrated in fig. 6, repeats no more in detail.
In an other embodiment, can also include before step 1001: by being electrically connected with described first detection electric capacity
The first tunable capacitor connect, and/or, the second tunable capacitor electrically connected with described second detection electric capacity, adjust when pressure detecting
Whole described first detection electric capacity capacitance greater than, equal to or less than described second detection electric capacity capacitance.This capacitance
Size matching relationship can also specifically process before step in discharge and recharge.
In the present embodiment, the capacitance size method to set up about the first detection electric capacity and the second detection electric capacity refers to above-mentioned
6 illustrated embodiments, repeat no more in detail.
In the present embodiment, correlation technique implement the embodiment that can refer to said apparatus, do not repeat them here.
This utility model embodiment also provides for a kind of touch control device using any of the above-described embodiment pressure-detecting device,
And use the electric terminal of this touch control device, such as smart mobile phone, panel computer, intelligent television etc..
It should be noted that in above-described embodiment, in can being same plane in the same face, it is also possible to be same curved surface
In.
The device that embodiments herein is provided can be realized by computer program.Those skilled in the art should be able to
Understand, above-mentioned unit and Module Division mode are only the one in numerous dividing mode, if be divided into other unit or
Module or non-divided block, as long as information object has above-mentioned functions, all should be within the protection domain of the application.
It will be understood by those skilled in the art that embodiments herein can be provided as method, device (equipment) or computer
Program product.Therefore, the application can use complete hardware embodiment, complete software implementation or combine software and hardware aspect
The form of embodiment.And, the application can use at one or more meters wherein including computer usable program code
The upper computer journey implemented of calculation machine usable storage medium (including but not limited to disk memory, CD-ROM, optical memory etc.)
The form of sequence product.
The application is with reference to method, device (equipment) and the flow chart of computer program according to the embodiment of the present application
And/or block diagram describes.It should be understood that can be by each flow process in computer program instructions flowchart and/or block diagram
And/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided to refer to
Order arrives the processor of general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce
One machine so that the instruction performed by the processor of computer or other programmable data processing device is produced and is used for realizing
The device of the function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and computer or other programmable data processing device can be guided with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in this computer-readable memory produces and includes referring to
Make the manufacture of device, this command device realize at one flow process of flow chart or multiple flow process and/or one square frame of block diagram or
The function specified in multiple square frames.
These computer program instructions also can be loaded in computer or other programmable data processing device so that at meter
Perform sequence of operations step on calculation machine or other programmable devices to produce computer implemented process, thus at computer or
The instruction performed on other programmable devices provides for realizing at one flow process of flow chart or multiple flow process and/or block diagram one
The step of the function specified in individual square frame or multiple square frame.
Although having been described for the preferred embodiment of the application, but those skilled in the art once know basic creation
Property concept, then can make other change and amendment to these embodiments.So, claims are intended to be construed to include excellent
Select embodiment and fall into all changes and the amendment of the application scope.Obviously, those skilled in the art can be to the application
Carry out various change and modification without deviating from spirit and scope.So, if these of the application are revised and modification
Belong within the scope of the application claim and equivalent technologies thereof, then the application is also intended to comprise these changes and modification exists
In.
Claims (14)
1. a pressure-detecting device, it is characterised in that include the first detection electric capacity, for the electricity with described first detection electric capacity
Capacitance carries out difference processing and detects electric capacity with eliminate interference signal second, and the first detection electric capacity includes pressure detecting electrode, the
Two detection electric capacity include that, with reference to detecting electrode, described pressure detecting electrode is arranged in the same face with reference to detecting electrode with described,
Make on described first detection electric capacity and the second detection electric capacity, to be coupled with the described interference letter that pressure detecting is formed interference simultaneously
Number.
Device the most according to claim 1, it is characterised in that described pressure detecting electrode respectively with the first conducting surface and
Two conducting surface couplings, form first respectively and effectively detect electric capacity and the first load detecting electric capacity；Described first detection electric capacity includes
Described first effectively detects electric capacity and the first load detecting electric capacity, and described first effectively detects electric capacity and the first load detecting electric capacity
Series connection；Described reference detecting electrode couples with described first conducting surface and described second conducting surface respectively, and forming second respectively has
Effect detection electric capacity and the second load detecting electric capacity, described second effectively detects electric capacity and the second load detecting capacitances in series, described
Second detection electric capacity includes that described second effectively detects electric capacity and the second load detecting electric capacity.
Device the most according to claim 2, it is characterised in that described first conducting surface is common reference electrode, and/or,
Second conducting surface is conduction shell on the back or the conduction center of the terminal including described pressure-detecting device.
Device the most according to claim 2, it is characterised in that described first conducting surface is for including described pressure-detecting device
Terminal conduction shell on the back or conduction center, and/or, described second conducting surface is common reference electrode.
Device the most according to claim 2, it is characterised in that the terminal being provided with described pressure-detecting device includes display
Equipment, described first conducting surface forms first and couples electric capacity, described display device and described second conduction with described display device
Face formed second coupling electric capacity, when pressure detecting first couple electric capacity and second coupling electric capacity capacitance identical；Described
One coupling electric capacity and described first detection capacitances in series, the second coupling electric capacity and the second detection capacitances in series, to pressure
The interference signal of detection is coupling on described first detection electric capacity and the second detection electric capacity simultaneously.
Device the most according to claim 1, it is characterised in that also include: pressure-driven electrode, described pressure detecting electrode
Coupling with described pressure-driven electrode, form first effective mutual capacitance, described first effective mutual capacitance is as described first detection
Electric capacity；Described reference detecting electrode couples with described pressure-driven electrode, forms second effective mutual capacitance, and described second the most mutually
Electric capacity is as described second detection electric capacity.
Device the most according to claim 1, it is characterised in that described first detection electric capacity and the first on-off circuit are electrically connected
Connect, described first detection electric capacity is charged or discharge process by described first on-off circuit when pressure detecting；With/
Or, the second detection electric capacity electrically connects with second switch circuit, to pass through described second switch circuit when pressure detecting to described
Second detection electric capacity is charged or discharge process.
Device the most according to claim 1, it is characterised in that described first detection electric capacity is electrically connected with for examining at pressure
The first tunable capacitor of the capacitance of described first detection electric capacity is adjusted during survey, and/or, described second detection electric capacity is electrically connected with
For adjusting the second tunable capacitor of the capacitance of described second detection electric capacity when pressure detecting.
Device the most according to claim 1, it is characterised in that the single described area with reference to detecting electrode is less than single institute
State the area of pressure detecting electrode so that described in when pressure detecting, the capacitance of the first detection electric capacity is more than described second detection
The capacitance of electric capacity.
Device the most according to claim 1, it is characterised in that multiple described pressure detecting electrodes form a pressure detecting
Electrod-array, described periphery and/or the centre being arranged on described pressure detecting electrod-array with reference to detecting electrode.
11. devices according to claim 1, it is characterised in that including: difference channel, described difference channel has forward
End and backward end, described first detection electric capacity electrically connects with described forward end, described second detection electric capacity and described backward end electricity
Connect, carry out difference processing with the capacitance to described first detection electric capacity and the second detection electric capacity.
12. devices according to claim 11, it is characterised in that described forward end electrical connection the 3rd on-off circuit, described
Backward end electrical connection the 4th on-off circuit, described first detection electric capacity is electrically connected with described forward end by described 3rd on-off circuit
Connecing, described second detection electric capacity is electrically connected with described backward end by the 4th on-off circuit.
13. 1 kinds of touch control devices, it is characterised in that include the pressure-detecting device described in any one of the claims 1-12.
14. 1 kinds of electric terminals, it is characterised in that include the touch control device described in the claims 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620582245.4U CN205809842U (en) | 2016-06-15 | 2016-06-15 | Pressure-detecting device, touch control device and electric terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620582245.4U CN205809842U (en) | 2016-06-15 | 2016-06-15 | Pressure-detecting device, touch control device and electric terminal |
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| CN205809842U true CN205809842U (en) | 2016-12-14 |
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