CN105426005A - Three-dimensional touch panel - Google Patents
Three-dimensional touch panel Download PDFInfo
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- CN105426005A CN105426005A CN201510888561.4A CN201510888561A CN105426005A CN 105426005 A CN105426005 A CN 105426005A CN 201510888561 A CN201510888561 A CN 201510888561A CN 105426005 A CN105426005 A CN 105426005A
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Abstract
The invention provides a three-dimensional touch panel. The three-dimensional touch panel comprises an insulation dielectric layer, a touch electrode layer and a pressure-sensitive electrode layer, wherein the touch electrode layer and the pressure-sensitive electrode layer are respectively positioned at two opposite sides of the insulation dielectric layer; the touch electrode layer comprises multiple sets of insulated and staggered touch electrodes and is used for detecting the position of a touch signal; the pressure-sensitive electrode layer comprises at least one pressure-sensitive electrode correspondingly arranged with at least one part of the touch electrodes and is used for detecting the pressure of the touch signal; the touch electrode correspondingly arranged with the pressure-sensitive electrode is also used for performing temperature compensation of the pressure-sensitive electrode; and the temperature compensation manner includes a positive and negative temperature coefficient material series manner, a value reduction manner and a Wheatstone bridge manner. The three-dimensional touch panel provided by the invention has the advantages of being high in detection precision, light, thin and the like.
Description
[technical field]
The present invention relates to touch-control field, particularly relate to three-dimensional touch field.
[background technology]
Contact panel is widely used in various consumer-elcetronics devices, such as: the portable electric products such as intelligent mobile phone, flat computer, camera, e-book, MP3 player, or is applied to the display screen of operational control unit.In recent years, a kind of three-dimensional touch panel simultaneously with planimetric position detecting and the detecting of pressing dynamics size receives extensive concern.
Three-dimensional touch panel conventional at present has a touch control electrode layer and double-deck pressure sensitivity electrode layer usually.Wherein touch control electrode layer is the planimetric position detecting touch signal, be generally capacitance touching control electrode, utilize the electric current of human body to respond to and carry out work: in touch area, set up planar two dimensional coordinate system (X, Y), the touch control electrode of X-direction and Y-direction is provided with in this region, when finger touch is in the touch-control surface corresponding to touch control electrode, due to human body electric field, finger changes the electric signal at touch point place, the accurate Calculation of electronic equipment internal by changing touch point place electric signal, draw the coordinate position of touch point in X-direction and Y-direction, namely determine the two-dimensional position of touch point and then control the display of electronic equipment, the operations such as redirect.And double-deck pressure sensitivity electrode layer is the pressing power size detecting touch signal, usually utilizes pressure drag material to make, judge the size of pressing dynamics according to the resistance change of material before and after pressurized.
In theory, resistance change after one deck pressure sensitivity electrode layer can detect pressurized and judge the size of pressing dynamics, but pressure drag material environment resistant interference common is at present poor, such as its resistance value can be subject to temperature (temperature of environment temperature or touch control operation finger) impact and change, thus causes the detecting of pressing dynamics not accurate enough.Thus double-deck pressure sensitivity electrode layer be must adopt, and temperature compensation and pressure detection carried out by Wheatstone bridge.
But the integral thickness being arranged so that electronic equipment of double-deck pressure sensitivity layer increases, the sensitivity of pressure detection can be affected, do not meet the development trend of existing lightening electronic equipment simultaneously, therefore, industry urgently proposes a kind of new Solutions of Temperature Compensation, to overcome the thick and heavy problem existing for existing three-dimensional touch panel.
[summary of the invention]
Detecting to pressing force value the harmful effect brought for overcoming current temperature effect, and making pressure detection not high and the problem that three-dimensional touch plate thickness is larger, the invention provides a kind ofly provides temperature compensation and lightening three-dimensional touch panel.
The present invention, for solving the problems of the technologies described above, provides a technical scheme: a kind of three-dimensional touch panel, comprising: an insulating medium layer, and a touch control electrode layer, a pressure sensitivity electrode layer lay respectively at the relative both sides of described insulating medium layer, wherein, described touch control electrode layer comprises the touch control electrode that many group insulation are crisscross arranged, in order to detect the position of a touch signal, described pressure sensitivity electrode layer comprises at least one pressure sensitivity electrode and many pressure sensitivity signal wires, described pressure sensitivity electrode is corresponding with at least part of described touch control electrode to be arranged, its relative two ends are electrically connected to a signal transacting center respectively by described pressure sensitivity signal wire, and detecting touches the resistance change situation of front and back, in order to judge the pressing power size of described touch signal, and the described touch control electrode that should arrange with pressure sensitivity electrode pair is also in order to carry out a temperature compensation to described pressure sensitivity electrode.
Preferably, described touch control electrode comprises the many groups first direction electrode and many group second direction electrodes that insulate and be crisscross arranged, often organize first direction electrode to comprise the multiple first direction electrode block laid along first direction interval and be connected two adjacent described first direction electrode blocks respectively with many first connecting lines, often organize second direction electrode and comprise the multiple second direction electrode blocks be laid in along second direction interval between two adjacent first direction electrodes; Described pressure sensitivity electrode is with first direction electrode described at least one group or second direction electrode block described at least one is corresponding arranges, and with the described first direction electrode that described pressure sensitivity electrode pair should be arranged or the corresponding described second direction electrode block arranged in order to carry out a temperature compensation to described pressure sensitivity electrode.
Preferably, described three-dimensional touch panel comprises many secondary signal lines, when described pressure sensitivity electrode be arrange with described at least one, second direction electrode block is corresponding time, the described two ends relative with the second direction electrode block that pressure sensitivity electrode pair should be arranged are connected to described signal transacting center respectively by described secondary signal line.
Preferably, described three-dimensional touch panel comprises many first signal wires further, and one end of described first direction electrode or relative two ends are connected to described signal transacting center respectively by described first signal wire.
Preferably, described first direction electrode block and described second direction electrode block are comb-like pattern, and are embedded mutually and put.
Preferably, the material of described pressure sensitivity electrode is identical with the material of the corresponding described second direction electrode block arranged, and described pressure sensitivity electrode carries out described temperature compensation with the corresponding described second direction electrode block arranged by the mode being connected to same Wheatstone bridge.
Preferably, the pattern of described pressure sensitivity electrode is not identical with the pattern of the corresponding described second direction electrode block arranged, and carries out described temperature compensation by the mode that a value subtracts.
Preferably, the pattern of described pressure sensitivity electrode is by radial, the convoluted of a pressure drag material conductive line bends or broken line type, and the corresponding described second direction electrode block pattern arranged is block structure.
Preferably, described pressure sensitivity electrode and described second direction electrode block positive and negative temperature coefficient materials each other, meet α between the two
pressure/ α
touch=(ρ
0 pressurel
pressure/ S
pressure)/(ρ
0 touchl
touch/ S
touch) time, described second direction electrode block is in order to carry out temperature compensation to described pressure sensitivity electrode; Wherein, L
pressure, S
pressure, ρ
0 pressurerepresent length, area, the resistivity of pressure sensitivity electrode respectively, L
touch, S
touch, ρ
0 touchesrepresent length, area, the resistivity of second direction electrode block respectively, α
pressurerepresent the temperature coefficient of the material forming described pressure sensitivity electrode, α
touchrepresent the temperature coefficient of the material forming described second direction electrode block.
Preferably, described pressure sensitivity electrode is 25mm with the area of the corresponding described second direction electrode block arranged
2~ 225mm
2.
Preferably, described pressure sensitivity electrode is identical with the corresponding described second direction electrode block pattern arranged, and material is not identical, and carries out described temperature compensation by the mode that a value subtracts.
Preferably, described three-dimensional touch panel comprises many first signal wires, when described pressure sensitivity electrode is with when described at least one group, first direction electrode pair should be arranged, the two ends relative with the described first direction electrode that described pressure sensitivity electrode pair should be arranged are connected to described signal transacting center respectively by described first signal wire.
Preferably, described three-dimensional touch panel comprises at least one collets, often organize described second direction electrode also to comprise many second connecting lines and connect two adjacent second direction electrode blocks respectively, described collets are arranged between described first connecting line and described second connecting line to make described first direction electrode and described second direction electrode be electrically insulated.
Preferably, described three-dimensional touch panel comprises many articles of the 3rd signal wires, and one end of described second direction electrode or relative two ends are connected to described signal transacting center respectively by described 3rd signal wire.
Preferably, described contact panel comprises many secondary signal lines, and one end of described second direction electrode block or relative two ends are connected to described signal transacting center respectively by described secondary signal line.
Preferably, described pressure sensitivity electrode and described first direction electrode block positive and negative temperature coefficient materials each other, the two pattern is identical and meet α
pressure/ α
touch=(ρ
0 pressure/ h
pressure)/(ρ
0 touches/ h
touch) time, described first direction electrode is in order to carry out a temperature compensation to described pressure sensitivity electrode; Wherein, h
pressure, ρ
0 pressurerepresent thickness, the length of pressure sensitivity electrode respectively, h
pressure, ρ
0 pressurerepresent thickness, the length of first direction electrode respectively, α
pressurerepresent the temperature coefficient of the material forming described pressure sensitivity electrode, α
touchrepresent the temperature coefficient of the material forming described first direction electrode.
Preferably, described pressure sensitivity electrode is identical with the corresponding described first direction electrode pattern arranged, and material is not identical, and carries out described temperature compensation by the mode that a value subtracts.
Preferably, described insulating medium layer is a substrate, and described touch control electrode layer and described pressure sensitivity electrode layer are the upper and lower surfaces being arranged at described substrate.
Preferably, described insulating medium layer is an optical cement; Described three-dimensional touch device also comprises a upper substrate and is positioned at the opposite side of described touch control electrode layer away from described optical cement; One infrabasal plate is positioned at the opposite side of described pressure sensitivity electrode layer away from described optical cement; Namely described touch control electrode layer is arranged at the lower surface of described upper substrate, and described pressure sensitivity electrode layer is arranged at the upper surface of described infrabasal plate, and described touch control electrode layer and described pressure sensitivity electrode layer are fitted by described optical cement again.
Preferably, described first direction electrode block and described first connecting line are formed in one structure.
Relative to prior art, three-dimensional touch panel provided by the invention has following advantage:
1, described three-dimensional touch panel has three-dimensional detecting function, because its touch control electrode layer and pressure sensitivity electrode layer are arranged on two relative low volume sides of same insulating medium layer, therefore, and the temperature compensation of touch control electrode to pressure sensitivity electrode can be realized, effectively prevent the method adopting and eliminate temperature effect impact as arranged hardware (as double-deck pressure sensitivity electrode layer) in prior art separately, thus reduce the thickness of the contact panel of pressure-sensing, meet the market demand of frivolous words electrode equipment instantly.
2, in the present invention, described pressure sensitivity electrode is corresponding with providing the touch control electrode of temperature compensation for it to be arranged, therefore, the variable quantity that both are subject to temperature is similar, by the restriction of the material to described pressure sensitivity electrode and above-mentioned touch control electrode, pattern or area etc., and the touch control electrode that positive and negative temperature coefficient materials combines, value subtracts mode and Wheatstone bridge mode realizes should arranging with pressure sensitivity electrode pair is adopted to carry out temperature compensation to pressure sensitivity electrode.
3, in certain embodiments, the touch control electrode that described pressure sensitivity electrode is arranged corresponding thereto can be and is arranged in series, thus is conducive to the detecting of resistance change, makes touch control electrode can carry out temperature compensation to the described pressure sensitivity electrode corresponding with it.
4, described touch control electrode comprises first direction electrode and second direction electrode, all arranges on the same layer, adopts collets to cut off between first direction electrode and second direction electrode, effectively can improve the precision of touch control operation signal detection.And adopt bilateral Wiring structure with the touch control electrode that pressure sensitivity electrode pair should be arranged, except can so that temperature compensation signal detecting except, can also antinoise signal decay.
5, the touch control electrode part in three-dimensional touch panel provided by the present invention can realize capacitance touch position and detect, and the strain of described pressure sensitivity electrode can produce corresponding resistance change according to pressing dynamics, thus realizes the judgement of pressing force size.Position signalling is different from the type of power high low signal, therefore, after the detecting completing touching signals, the described touch control electrode that should arrange with described pressure sensitivity electrode pair can carry out temperature compensation signal detecting to described pressure sensitivity electrode, unaffected between the two, thus while guarantee effect temperature compensation, can avoid causing interference to the position signalling pressed and power high low signal, realize three-dimensional touch operation.
[accompanying drawing explanation]
Figure 1A to Fig. 1 C is the rhythmo structure schematic diagram of first embodiment of the invention three-dimensional touch panel;
Fig. 2 is the planar structure schematic diagram of the touch control electrode layer of first embodiment of the invention three-dimensional touch panel;
Fig. 3 is the planar structure schematic diagram of the pressure sensitivity electrode layer of first embodiment of the invention three-dimensional touch panel;
Fig. 4 A, 4B are the planar structure schematic diagram of other mode of texturing of pressure sensitivity electrode layer of first embodiment of the invention three-dimensional touch panel;
Fig. 5 A to Fig. 5 C is other mode of texturing schematic diagram of pressure sensitivity electrode of first embodiment of the invention three-dimensional touch panel;
Fig. 6 A, Fig. 6 B are first embodiment of the invention three-dimensional touch panel Wheatstone bridge connected mode schematic diagram;
Fig. 7 is the planar structure schematic diagram of another mode of texturing of touch control electrode layer of first embodiment of the invention three-dimensional touch panel;
Fig. 8 A is the planar structure schematic diagram of the touch control electrode layer of second embodiment of the invention three-dimensional touch panel;
Fig. 8 B is the planar structure schematic diagram of the pressure sensitivity electrode layer of second embodiment of the invention three-dimensional touch panel.
[embodiment]
In order to make object of the present invention, technical scheme and advantage are clearly understood, below in conjunction with accompanying drawing and embodiment, are further elaborated to the present invention.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Figure 1A to Fig. 1 C, Figure 1A to Fig. 1 C is the rhythmo structure schematic diagram of first embodiment of the invention three-dimensional touch panel.As shown in Figure 1A, first embodiment of the invention three-dimensional touch panel 10 comprises insulating medium layer 16, touch control electrode layer 15 and a pressure sensitivity electrode layer 17 lays respectively at the relative both sides of insulating medium layer 16.Touch control electrode layer 15 comprises the many groups of touch control electrode be crisscross arranged in order to detect the position of a touch signal, and pressure sensitivity electrode layer 17 comprises the pressure sensitivity electrode 171 that arrange corresponding at least part of touch control electrode, in order to detect the pressing power size of this touch signal.In the present invention, touch control electrode layer 15 simultaneously also in order to carry out a temperature compensation to pressure sensitivity electrode layer 17, namely with thinking that pressure sensitivity electrode layer 17 provides a temperature compensation signal.In the present invention, " corresponding setting " refers to that pressure sensitivity electrode and touch control electrode (at least one group of first direction electrode hereinafter or at least one second direction electrode block) are vertical corresponding up and down at the position of insulating medium layer both sides, and the area of the two is roughly the same, but material therefor, concrete pattern (pattern in the present invention refers to the pattern of electrode relative to bearing substrate vertical projection) are then not limited.
As shown in Figure 1B, in certain embodiments of the present invention, insulating medium layer 16 is a substrate, and it has relative upper surface 161 and lower surface 162, touch control electrode layer 15 is the upper surfaces 161 being arranged at substrate 16, and pressure sensitivity electrode layer 17 is the lower surfaces 162 being arranged at substrate 16.The material of substrate 16 can be hard or the flexible materials such as glass, sapphire, polyimide (PI), polypropylene (PP), polystyrene (PS), acrylonitrile-butadiene-styrene (ABS) (ABS), polyethylene terephthalate (PET), Polyvinylchloride (PVC), polycarbonate (PC), tygon (PE), polymethylmethacrylate (PMMA), teflon (PTFE).Touch control electrode layer 15 is follow-up to fit a cover sheet (or display device) by a glue-line, and pressure sensitivity electrode layer 17 fits a display device (or cover sheet) to form a complete three-dimensional touch display device by another glue-line.
In certain embodiments, described substrate 16 is a kind of film substrate especially, and to make described three-dimensional touch panel 10 after being under pressure, the both sides of described substrate 16 are all stretching or compression set, to strengthen the intensity of pressure-sensing signal.
As shown in Figure 1 C, in other embodiments of the present invention, insulating medium layer 16 is an optical cement; Three-dimensional touch device 10 also comprises a upper substrate 11 and infrabasal plate 12, and wherein upper substrate 11 is positioned at the opposite side of touch control electrode layer 15 away from optical cement 16, and infrabasal plate 12 is positioned at the opposite side of pressure sensitivity electrode layer 17 away from optical cement 16; Namely touch control electrode layer 15 is arranged at the lower surface of upper substrate 11, and pressure sensitivity electrode layer 17 is arranged at the upper surface of infrabasal plate 12, and touch control electrode layer 15 and pressure sensitivity electrode layer 17 are fitted by optical cement 16 again.Wherein, upper substrate 11 (or infrabasal plate 12) can be a cover sheet, and with providing a touch-surface and protection enclosing cover, and infrabasal plate 12 (or upper substrate 11) also can be display device parts.
Referring again to Fig. 2 to Fig. 3, wherein, Fig. 2 is the planar structure schematic diagram of the touch control electrode layer of first embodiment of the invention three-dimensional touch panel; Wherein, Fig. 3 be first embodiment of the invention three-dimensional touch panel 10 the planar structure schematic diagram of pressure sensitivity electrode layer 17.In the present embodiment, touch control electrode 150 comprises the many groups first direction electrode 151 and many group second direction electrodes 153 that insulate and be crisscross arranged, wherein many group first direction electrodes 151 are extend along first direction (as illustrated X-direction), and along second direction (as illustrated Y-direction) parallel arrangement; In an embodiment, X-direction is vertical with Y-direction wherein.Above-mentioned first direction and second direction unrestricted relative to the particular location of described three-dimensional touch panel 10.
More specifically, often group first direction electrode 151 comprises the multiple first direction electrode block 1511 laid along first direction interval and is connected two adjacent first direction electrode blocks 1511 respectively with many first connecting lines 1513, in certain embodiments, multiple first direction electrode block 1511 and many first connecting lines 1513 are formed in one structure, namely material that can be identical completes in same step, there is not obvious boundary line even therebetween.Often organize second direction electrode 153 and comprise the multiple second direction electrode blocks 1531 be laid in along second direction interval between two adjacent first direction electrodes 151.In the present embodiment, often organize one end of first direction electrode 151 by being electrically connected to a signal transacting center (not shown) with the first signal wire 155, the two ends that each second direction electrode block 1531 is relative are electrically connected to aforementioned signal processing enter (the two outlet method of hereinafter referred) respectively by a secondary signal line 156; Many groups first direction electrode 151 with how organize second direction electrode 153 and launches or receive electric signal, processing enter changes according to the capacitance signal detected before and after touching the planimetric position judging touch point.
In the present embodiment, pressure sensitivity electrode layer 17 comprises at least one pressure sensitivity electrode 171, arranges across insulating medium layer 16 is corresponding with at least one second direction electrode block 1531.The two ends that pressure sensitivity electrode 171 is relative are electrically connected to aforesaid signal transacting center respectively by a pressure sensitivity signal wire 175, and detecting touches the resistance change situation of front and back.
As shown in Fig. 2-Fig. 3, in the present embodiment, in pressure sensitivity electrode layer 17, the quantity of pressure sensitivity electrode 171 is identical with the quantity of second direction electrode block 1531 in touch control electrode layer 15, and is one_to_one corresponding setting, with in pressure detection process, a temperature compensation is carried out to pressure sensitivity electrode 171.
In other embodiments, as shown in Fig. 4 A, 4B, the difference of pressure sensitivity electrode layer 17 shown in pressure sensitivity electrode layer 17a, 17b and Fig. 3 is: the quantity of pressure sensitivity electrode 171 also can be less than the quantity of second direction electrode block 1531, and can optionally correspondingly with part second direction electrode block 1531 arrange; Further, also not each second direction electrode block 1531 all needs to adopt two outlet method, only needs to ensure that the two ends of the second direction electrode block 1531 that arrange corresponding to pressure sensitivity electrode 171 are all electrically connected to signal transacting center by secondary signal line 156; In addition, often organize the relative two ends of first direction electrode 151 and also all can be electrically connected to signal transacting center (i.e. two outlet method) by one first signal wire 155, this pair of outlet method can in the process of capacitance signal detecting, all launched by two ends or receive the decay that electric signal avoids signal, the sensitivity of raised position detecting.
In the present embodiment, the second direction electrode block 1531 that arrange corresponding to pressure sensitivity electrode 171 is except in the process detected at the capacitance signal of the first sequential, in order to launch or to receive outside electric signal, also in the resistance signal detecting process of the second sequential, synchronously the resistance value change amount signal after stressed pressing is detected with pressure sensitivity electrode, in order to when calculating pressing dynamics size, a temperature compensation is carried out to pressure sensitivity electrode 171 resistance change.
More specifically, in the present embodiment, the mode utilizing touch control electrode layer 15 pairs of pressure sensitivity electrode layers 17 to carry out a temperature compensation mainly comprises three kinds: Positive and Negative Coefficient Temperature material in series mode, value subtract mode and Wheatstone bridge mode, different temperature compensation modes has different requirements to the pattern of touch control electrode layer 15 and pressure sensitivity electrode layer 17, material, specifically has following several combination:
Positive and negative temperature coefficient materials series system:
According to computing formula R=ρ L/S and the temperature variant formula ρ of resistivity of material of object resistance
t=ρ (1+ α T), can derive the resistance change amount of object temperature influence:
ΔR
T＝R
T2-R
T1
＝(1+αT
2)ρ
0L/S-(1+αT
1)ρ
0L/S
＝(T
2-T
1)αρ
0L/S
＝ΔTα(ρ
0L/S)
＝ΔTαR
0(1)；
Wherein, Δ T is expressed as the temperature variation of object, ρ
0for material is the resistivity of T=0 DEG C, α is resistivity of material temperature coefficient, according to the resistivity of material and temperature is proportionate or negative correlation and show as on the occasion of or negative value, be the intrinsic property of material, R
0for object is the resistivity of T=0 DEG C, can according to the object resistance value R measured at arbitrary temperature T
tand the ρ of material
0, α calculate and obtain.
In theory, when two objects (pressure sensitivity electrode and the corresponding touch control electrode arranged as invention) are arranged at the both sides up and down of a heat conduction object (as insulating medium layer 16 of the present invention), then touch electrode and Δ T that touch control electrode is causing by extraneous thermal effect are identical.
Suppose Δ R
f presses, Δ R
f touchesbe respectively pressure sensitivity electrode, touch control electrode is stressed the resistance change amount acting on and producing, Δ R
t presses, Δ R
t touchesbe respectively pressure sensitivity electrode, touch control electrode temperature influence and the resistance change amount produced, and Δ R
pressure, Δ R
touchbe respectively pressure sensitivity electrode, the actual resistance change amount measured of touch control electrode, wherein Δ R
pressure=Δ R
f presses+ Δ R
t presses, Δ R
touch=Δ R
f touches+ Δ R
t touches.
In the present embodiment, temperature variation is eliminated on the impact of the variable quantity of described pressure sensitivity electrode 171 resistance value in order to reach, thus obtain the pressing force signal of not temperature influence, the material that can temperature coefficient be adopted positive and negative each other with described second direction electrode block 1531 at described pressure sensitivity electrode 171, and connect when measured resistance value changes.Particularly, in the first sequential, the second direction electrode block 1531 that arrange corresponding to pressure sensitivity electrode 171 can be used for detecting positional information, and in the second sequential, the second direction electrode block 1531 that arrange corresponding to pressure sensitivity electrode 171 switches to be formed with pressure sensitivity electrode 171 and connects, thus realizes described second direction electrode block 1531 for pressure sensitivity electrode 171 and provide temperature compensation.Its temperature compensation principle is as follows:
Resistance change amount Δ R after pressure sensitivity electrode 171 described in finger presses and the described touch control electrode arranged corresponding to it
always(impact containing pressure and temperature) is:
Δ R
always=Δ R
pressure+ Δ R
touch=(Δ R
f pressure+Δ R
t presses)+(Δ R
f touches+ Δ R
t touches) (2);
Wherein, Δ R
f presseswith Δ R
f touchesonly relevant with finger presses power size, have nothing to do with temperature variation.And Δ R
t presseswith Δ R
t touchesonly relevant with temperature variation, can pass through Δ R
t presseswith Δ R
t touchesand be adjusted to less, thus reduce the impact of temperature.
In the present embodiment, following design can be adopted: described pressure sensitivity electrode 171 is formed by PTC material (or negative temperature coefficient material) to obtain more excellent effect temperature compensation, described second direction electrode block 1531 is formed by negative temperature coefficient material (or PTC material), i.e. the material positive and negative temperature coefficient materials each other that adopts of described pressure sensitivity electrode 171 and described second direction electrode block 1531.
Wherein, described PTC material refers to the material that the resistance value of himself raises along with temperature rising, and described negative temperature coefficient material refers to the material that the resistance value of himself reduces along with temperature rising.
In the present embodiment, herein and the following stated PTC material can be including but not limited to: the metals such as nano level silver, copper, aluminium, gold, or tin indium oxide (IndiumTinOxide, ITO), tin-antiomony oxide (AntimonyDopedTinOxide, ATO), indium zinc oxide (IndiumZincOxide, the metal oxide such as IZO), or Graphene, metal grill, electrically conducting transparent macromolecular material any one material.
Herein and the following stated negative temperature coefficient material can be including but not limited to: CNT, zinc paste.
In the present embodiment, the material that pressure sensitivity electrode 171 and second direction electrode block 1531 adopt is different, the ascending amount of resistance and negative temperature coefficient material is caused to decline with temperature and cause cancelling out each other between the slippage of resistance because PTC material rises with temperature, i.e. Δ R
t presses+ Δ R
t touches=0, thus the temperature compensation that can realize that second direction electrode block 1531 pairs of pressure sensitivity electrodes 171 carry out.
Further, in order to make Δ R
t presses+ Δ R
t touches=0 sets up, then Δ R
t presseswith Δ R
t touchneed meet the following conditions:
α
pressureΔ T (ρ
0 pressurel
pressure/ S
pressure)+α
touchΔ T (ρ
0 touchesl
touch/ S
touch)=0 (3);
Wherein, the present invention herein and the L of the following stated
pressure, L
touch, S
pressure, S
touch, ρ
0 pressure, ρ
0 touchesrepresented content is as follows: L
pressure, S
pressure, ρ
0 pressurerepresent length, area, resistivity that pressure sensitivity electrode 171 is initial respectively; L
touch, S
touch, ρ
0 touchesrepresent length, area, resistivity that second direction electrode block 1531 (second direction electrode 153) is initial respectively; α
pressurerepresent the temperature coefficient of the material forming described pressure sensitivity electrode 171, wherein, α
pressurevalue can be plus or minus.α
touchrepresent the temperature coefficient of the material forming described second direction electrode block 1531, wherein, described second direction electrode block 1531 is corresponding with described pressure sensitivity electrode 171 to be arranged, α
pressurevalue can be negative or positive, L
pressurevalue and L
touchvalue is further expressed as described pressure sensitivity electrode 171 and the length of described second direction electrode block 1531 along direction of current.
Specifically can be divided into the following two kinds situation:
Form the material positive and negative temperature coefficient materials each other of pressure sensitivity electrode 171 and second direction electrode block 1531.
As worked as | α
pressure/ α
touch| when=1 (| α
pressure|=| α
touch|), in order to make above-mentioned formula (3) set up, then:
(ρ
0 pressurel
pressure/ S
pressure)/(ρ
0 touchesl
touch/ S
touch)=1 (4);
Wherein, in above-mentioned formula (4), electricalresistivityρ
0 pressurewith electricalresistivityρ
0 touchesfor forming the properties of materials of pressure sensitivity electrode 171 or second direction electrode block 1531, therefore, as | α
pressure/ α
touch| when=1, its electricalresistivityρ
0 pressurewith electricalresistivityρ
0 touchesratio also can ignore, therefore only need consider (L
pressure/ S
pressure)/(L
touch/ S
touch) value whether be 1.
And work as | α
pressure/ α
touch| when ≠ 1, in order to make above-mentioned formula (3) all set up, then:
α
pressure/ α
touch=(ρ
0 pressurel
pressure/ S
pressure)/(ρ
0 touchesl
touch/ S
touch) (5);
As can be seen from above-mentioned formula (5), Δ R
t presses+ Δ R
t touchesvalue whether equal 0, have nothing to do with the pattern form of described pressure sensitivity electrode 171 and described second direction electrode block 1531, its pattern can be identical or not identical.
Those skilled in the art also can according to above-mentioned formula (4) and formula (5), to the length L of single pressure sensitivity electrode 171 and the single second direction electrode block 1531 that arrange corresponding to it with adjust along the cross-sectional area S of direction of current.
In order to eliminate or weaken temperature, the resistance of described pressure sensitivity electrode 171 is affected, need to control pressure sensitivity electrode 171 and accept identical temperature variation Δ T with its corresponding second direction electrode block 1531 entirety arranged, and the absolute value of formula α (ρ L/S) in pressure sensitivity electrode 171 and the second direction electrode block 1531 arranged corresponding to it need be made close, just can make Δ R
t presseswith Δ R
t touchesbetween can cancel out each other, therefore, to achieve the above object, also further the area of corresponding with it for the pressure sensitivity electrode 171 second direction electrode block 1531 arranged can be defined as 25mm in the present invention
2-225mm
2.The area of pressure sensitivity electrode 171 is 25mm
2~ 225mm
2, be preferably 25mm
2to 100mm
2that the power pointed with an adult normal and temperature action scope match.The above-mentioned restriction about pressure sensitivity electrode 171 second direction electrode block 1531 area that arrange corresponding to it, thus can avoid because pressure sensitivity electrode 171 area is excessive or too small, and the problem making finger temperature change cannot obtain accurately induction occurs.Particularly, in the present invention, conventional force application object (capacitance pen or finger) is in the scope that normally exerts a force (0 ~ 10N), and the deformation range that effectively can be detected by pressure sensitivity electrode 171, probably can at 25mm
2to 225mm
2scope in, and the common force application object with temperature such as finger is after pressing, and the scope that its temperature can have influence on is about and is less than 225mm
2, be more preferred from and be less than 100mm
2.
But in a further embodiment, those skilled in the art are when can be different with amount of force and determine different induction ranges according to force application object.
Form pressure sensitivity electrode 171 and formed except touch control electrode 154 except above-mentioned employing has PTC material (or negative temperature coefficient material) with negative temperature coefficient material (or PTC material), also can subtract mode and make second direction electrode block 1531 pairs of pressure sensitivity electrodes 171 carry out temperature compensation by adopted value.
Value subtracts mode 1:
According to computing formula R=ρ L/S and the temperature variant formula ρ of resistivity of material of object resistance
t=ρ (1+ α T), can derive the resistance change amount of object temperature influence, as Δ R
t=Δ T α R
0, wherein, α is the temperature coefficient of material, R
0for the object of temperature influence is the resistance value of 0 DEG C, Δ T is the temperature variation of object, Δ R
tfor the resistance change amount of object temperature influence.
In theory, when two objects (pressure sensitivity electrode and the corresponding touch control electrode arranged as invention) are arranged at the both sides up and down of a heat conduction object (as insulating medium layer 16 of the present invention), then pressure sensitivity electrode and Δ T that touch control electrode is causing by extraneous thermal effect are identical, and the character pattern of pressure sensitivity electrode and touch control electrode determine after its α R
0also be known, temperature influence both that and the resistance change amount ratio produced is a constant.
Identical with the embodiment of the first temperature compensation above-mentioned, the resistance change amount Δ R that pressure sensitivity electrode 171 reality can be measured
pressure=Δ R
f presses+ Δ R
t presses, and the resistance change amount Δ R that second direction electrode block 1531 reality can be measured
touch=Δ R
f touches+ Δ R
t touches.
Then forgoing relationship can be by formulae express:
Wherein, k is expressed as pressure sensitivity electrode 171 and second direction electrode block 1531 temperature influence and the resistance change amount ratio produced, and it is a constant.
In a kind of ideal situation, touch control electrode only produces resistance change to temperature-responsive and does not produce resistance change, i.e. Δ R to pressure-responsive
f touchesequal 0, described second direction electrode block 1531, when carrying out temperature compensation, can subtract mode and calculates by adopted value:
Δ R
f presses=Δ R
pressure-Δ R
t presses
=Δ R
pressure-k Δ R
t touches
=Δ R
pressure-k (Δ R
touch-Δ R
f touches)
=Δ R
pressure-k Δ R
touch[Δ R
f touches=0] (7);
But in actual applications, if pattern area is greater than the scope of force application object temperature impact, and pressure sensitivity electrode 171 not identical with the pattern of the corresponding touch control electrode 154 arranged time, then pressure sensitivity electrode 171 and corresponding touch control electrode 154 temperature influence arranged produce the Δ R of resistance change
t presses, Δ R
t touches, the R ' only with the two within the scope of temperature influence
0 pressure, R '
0 toucheslinear relevant, and the not actual detectable R with the two
0 pressure, R
0 touchesthe proportionate relationship becoming to determine, causes pressure sensitivity electrode and the corresponding touch control electrode the arranged resistance change amount ratios delta R within the scope of temperature influence
t presses/ Δ R
t touchescannot determine, namely aforementioned formula (6) is false.
And, when three-dimensional touch panel has light transmission demand, the available material of described touch control electrode layer 15 is by comprising at least one of PEDOT, ITO, carbon nano-tube, gallium oxide zinc, indium oxide gallium zinc, Graphene, metal nanometer line, metal grill etc., and these materials are also the pressure drag materials that pressure sensitivity electrode layer is conventional, namely the material that touch control electrode layer is selected also can be pressed power effect and produce change in resistance, i.e. Δ R
f touches≠ 0, then above-mentioned formula (7) is false.
For solving the problem, the adoptable value of the present invention subtracts mode 1 can do following design: pressure sensitivity electrode 171 is 25mm with the area of the corresponding second direction electrode block 1531 arranged
2~ 225mm
2, pattern is not identical, and material can be identical or not identical.When pressure sensitivity electrode 171 is 25mm with the area of the corresponding second direction electrode block 1531 arranged
2~ 225mm
2be preferably 25mm
2to 100mm
2time, can ensure after being subject to force application object effect, pressure sensitivity electrode 171 and the overall all temperature influences of the corresponding second direction electrode block 1531 arranged, namely pressure sensitivity electrode 171 is by the R ' in force application object temperature pattern
0 pressureits direct detectable overall resistance R i.e.
0 pressure, the corresponding second direction electrode block 1531 arranged is by the R ' in force application object temperature pattern
0 touchesits direct detectable overall electrical resistance R i.e.
0 touches, namely above-mentioned formula (6) is set up.Wherein, about pressure sensitivity electrode 171 and consistent with the reason limited the area of pressure sensitivity electrode 171 and second direction electrode block 1531 in the restriction reason of the area of its corresponding second direction electrode block 1531 arranged and the present embodiment first embodiment, do not repeat them here.
Second direction electrode block 1531 and pressure sensitivity electrode 171 are designed to different pattern, in the present embodiment, be designed to touch control electrode 154 to the more insensitive pattern of pressure, and pressure sensitivity electrode 171 are designed to pressure-sensitive pattern, makes Δ R
f touchrelative to Δ R
f pressesnegligible, i.e. Δ R
f touches≈ 0, then above-mentioned formula (7) is set up.Such as touch control electrode 154 is the block structure such as triangle or square as shown in Figure 3, and pressure sensitivity electrode 171 then as shown in Figure 5 A to FIG. 5 C, is radial, convoluted or the broken line type of a pressure drag material conductive line bends.
Value subtracts mode 2:
Pressure sensitivity electrode 171 is identical with corresponding touch control electrode 154 pattern arranged, and material is not identical, and area is unrestricted.
Subtract in mode 2 in value, because pressure sensitivity electrode 171 is identical with corresponding touch control electrode 154 pattern arranged, then regardless of the area of the two, can think that the two is at the R ' at place that is pressed
0 pressure, R '
0 toucheswith the R of the two entirety
0 pressure, R
0 touchesin identical corresponding relation, i.e. R '
0 pressure/ R '
0 touches=R
0 pressure/ R
0 touches, namely above-mentioned formula (6) is set up.
And pressure sensitivity electrode 171 and the corresponding second direction electrode block 1531 arranged select different materials, make pressure sensitivity electrode 171 select the material more responsive to pressure, and the corresponding second direction electrode block 1531 arranged is selected the more insensitive material of pressure, makes Δ R
f touchesrelative to Δ R
f pressesnegligible i.e. Δ R
f touches≈ 0, then above-mentioned formula (7) is also set up.
Except above-mentioned employing second direction electrode block 1531 carries out, except the mode of temperature compensation, also by Wheatstone bridge mode, realizing temperature compensation to described pressure sensitivity electrode 171, specific as follows:
Wheatstone bridge mode:
In this embodiment, described pressure sensitivity electrode 171 can be identical with the material of the corresponding second direction electrode block 1531 arranged, and pattern can be identical or different, and its area is unrestricted.
When pressure sensitivity electrode 171 is 25mm with the area of the corresponding second direction electrode block 1531 arranged
2~ 225mm
2(identical with first, second embodiment), material is identical, and Wheatstone bridge can be adopted more accurately to carry out temperature compensation.
Specifically, pressure sensitivity electrode 171 is accessed in same Wheatstone bridge, according to Δ R with the corresponding second direction electrode block 1531 arranged in the mode of the serial or parallel connection shown in Fig. 6 A or Fig. 6 B
t=Δ T α R
0with the registration U0 ∝ (R pressing the positively related voltmeter U0 of dynamics size in Fig. 6 A
pressure/ Ra – R
touch/ Rb), suppose the U0=0 when being not pressed, pressure sensitivity electrode is T1 with the corresponding touch control electrode temperature arranged, from T after being pressed
1to T
2be changed to Δ T, then can obtain following formula:
From above formula, U0 and Δ T has nothing to do, U0 ∝ (R in Fig. 6 B
pressure/ R
touch-Ra/Rb) also the similar U0 and Δ T that can derive have nothing to do, when namely adopting Wheatstone bridge mode to carry out temperature compensation, pressure sensitivity electrode 171 can realize temperature compensation completely with the corresponding second direction electrode block 1531 arranged, and the pattern of the two can be identical or not identical.
In the present embodiment, the second direction electrode block 1531 of touch control electrode layer 15 is arranged at the side of the first connecting line 1513, i.e. first direction electrode block 1511, second direction electrode block 1531 is arranged alternately for bulk is oblique, but the pattern of touch control electrode layer of the present invention is not limited thereto, in other embodiments, the pattern of touch control electrode layer 15a as shown in Figure 7, first direction electrode 151a, second direction electrode block 1531a is that pectination is embedded mutually and puts, namely the comb of second direction electrode block 1531a is embedded in the comb gap of first direction electrode 151a, the design that this pectination is mutually embedding, the coupling capacitance between first direction electrode 151a and second direction electrode block 1531a can be increased, the sensitivity that raised position detects.
In certain embodiments, the touch control electrode that arrange corresponding to described pressure sensitivity electrode 171 also can be one or more in second direction electrode 153, first direction electrode block 1511, first direction electrode 151, also unrestricted at this.
It is the planar structure schematic diagram of the touch control electrode layer of second embodiment of the invention three-dimensional touch panel referring again to Fig. 8 A to Fig. 8 B, Fig. 8 A; Fig. 8 B be second embodiment of the invention three-dimensional touch panel the planar structure schematic diagram of pressure sensitivity electrode layer.Second embodiment of the invention three-dimensional touch panel 20 comprises a touch control electrode layer 25, and a pressure sensitivity electrode layer 27 lays respectively at the relative both sides of insulating medium layer.With the first embodiment unlike, in the present embodiment, in touch control electrode layer 25, often group first direction electrode 251 also comprises many first connecting lines 2513 and connects two adjacent first direction electrode blocks 2511 respectively, often group second direction electrode 253 also comprises many second connecting lines 2533 and connects two adjacent second direction electrode blocks 2531 respectively, and touch control electrode layer 25 also comprises collets 252 and is arranged between the first connecting line 2513 and the second connecting line 2533 to make first direction electrode 251 and second direction electrode 253 be electrically insulated.
At least one end of first direction electrode 251, second direction electrode 253 is electrically connected to a signal transacting center (not shown) to launch or to receive electric signal respectively by one first signal wire 255, the 3rd signal wire 257, and judges the planimetric position of touch point according to the capacitance signal change detected before and after touch.
In the present embodiment, the quantity of pressure sensitivity electrode 271 is identical with the quantity of first direction electrode 251, and is one_to_one corresponding setting, and often group pressure sensitivity electrode 271 also comprises many pressure sensitivity signal wires 277 and connects two adjacent pressure sensitivity electrodes 271.But in other embodiments, the quantity of pressure sensitivity electrode 271 also can be less than the quantity of first direction electrode 251, and only correspondingly with part first direction electrode 251 to arrange.The first direction electrode 251 that arrange corresponding to pressure sensitivity electrode 271 is electrically connected to except aforementioned signal processing enter by one first signal wire 255 except wherein one end, and its relative other end is also electrically connected to aforementioned signal processing enter by another first signal wire 255.
Correspondingly, in other embodiments of the present invention, touch control electrode layer 25 also can adopt touch control electrode layer design as shown in Figure 2, and namely the one or both ends of second direction electrode are electrically connected to aforementioned signal processing enter respectively by a secondary signal line.
In the present embodiment, the first direction electrode 251 that arrange corresponding to pressure sensitivity electrode 271 is except in the process detected at the capacitance signal of the first sequential, in order to launch or to receive outside electric signal, also in the resistance signal detecting process of the second sequential, synchronously the resistance value change amount signal after stressed pressing is detected with pressure sensitivity electrode, in order to when calculating pressing dynamics size, a temperature compensation is carried out to pressure sensitivity electrode 271 resistance change.
In a further embodiment, described pressure sensitivity electrode 271 also can be irregular array distribution or spaced apart, its distributing position and quantity unrestricted.Described pressure sensitivity electrode 271 can correspondingly with the part of described first direction electrode 251 or second direction electrode 253 be arranged, and realizes described first direction electrode 251 or second direction electrode 253 carries out a temperature compensation to described pressure sensitivity electrode 271.
In the present embodiment, the variant embodiment carrying out temperature compensation can be similar to positive and negative temperature coefficient materials tandem compound mode in first embodiment of the invention, wherein, pressure sensitivity electrode 271 needs identical with the pattern of the corresponding first direction electrode 251 arranged, cause the resistance change of equal proportion to ensure temperature influence, material is not identical and its temperature coefficient is positive and negative each other.
Formula (5) in positive and negative temperature coefficient materials tandem compound mode in first embodiment, also can be expressed as further:
α
pressure/ α
touch=(ρ
0 pressurel
pressure/ d
pressureh
pressure)/(ρ
0 touchesl
touch/ d
touchh
touch) (5 ')
Wherein, L
pressure, L
touch, ρ
0 pressure, ρ
0 touches, α
pressureand α
touchrepresented content is as similar in the first embodiment Chinese style (5), does not repeat them here.D
pressureand d
touchrepresent pressure sensitivity electrode 171 and the first direction electrode 251 that arrange corresponding to it width along direction of current xsect respectively, h
pressureand h
touchrepresent the thickness of pressure sensitivity electrode 171 and the first direction electrode 251 that arrange corresponding to it respectively.
Further, temperature compensation is completely carried out in order to realize first direction electrode 251 pairs of pressure sensitivity electrodes 271, described first direction electrode 251 also can be made identical with described pressure sensitivity electrode 271 pattern, namely the length (more excellent is the length of electrode along direction of current) of the two is identical with thickness, then L in above-mentioned formula (5 ')
pressure=L
touchand d
pressure=d
touch, therefore, formula (5 ') can be expressed as further:
α
pressure/ α
touch=(ρ
0 pressure/ h
pressure)/(ρ
0 touches/ h
touch) (5 ＂)
When the material forming described pressure sensitivity electrode 171 and the described first direction electrode 251 that arrange corresponding to it is for determining material, i.e. the middle α of above-mentioned formula (5 ＂)
pressure/ α
touchbe the value determined, and ρ
0 pressure/ ρ
0 touchesalso be a determined value, therefore, only need to adjust h
pressure/ h
touchratio, first direction electrode 251 pairs of pressure sensitivity electrodes 271 can be realized and carry out effective temperature compensation.
In the present embodiment, the mode of carrying out temperature compensation also can adopt the value being similar to the second embodiment in aforementioned first embodiment to subtract mode 2:
Pressure sensitivity electrode 271 is identical with corresponding first direction electrode 251 pattern arranged, and material is not identical, and area is unrestricted.
Subtract in mode 2 in value, because pressure sensitivity electrode 271 is identical with corresponding first direction electrode 251 pattern arranged, then regardless of the area of the two, can think that the two is at the R ' at place that is pressed
0 pressure, R '
0 toucheswith the R of the two entirety
0 pressure, R
0 touchesin identical corresponding relation, i.e. R '
0 pressure/ R '
0 touches=R
0 pressure/ R
0 touches, above-mentioned formula (6) is set up.
And pressure sensitivity electrode 271 and the corresponding first direction electrode 251 arranged select different materials, make pressure sensitivity electrode 271 select the material more responsive to pressure, and the corresponding second direction electrode block 2531 arranged is selected the more insensitive material of pressure, makes Δ R
f touchesrelative to Δ R
f pressesnegligible i.e. Δ R
f touches≈ 0, then above-mentioned formula (7) is set up.
In a further embodiment, the mode that the first embodiment of first embodiment of the invention also can be adopted to match with the second embodiment realizes described first direction electrode 251 or described second direction electrode 253 carries out a temperature compensation to described pressure sensitivity electrode 271.
The three-dimensional touch panel of the present invention's design, by the material to described pressure sensitivity electrode and above-mentioned touch control electrode, pattern or area etc. limit, and just adopt, negative temperature coefficient material tandem compound mode, value subtracts mode and Wheatstone bridge mode, the touch control electrode realizing should arranging with pressure sensitivity electrode pair carries out temperature compensation to pressure sensitivity electrode, eliminate or weaken temperature effect and the harmful effect brought is detected to pressing force value, the precision of pressure detection is higher, and namely achieve temperature compensation without the need to arranging hardware separately, reduce the thickness of three-dimensional touch panel, to adapt to the market demand of lightening electronic equipment instantly.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within principle of the present invention, equivalent replacement and improvement etc. all should be included within protection scope of the present invention.
Claims (20)
1. a three-dimensional touch panel, is characterized in that, comprising:
One insulating medium layer, and
One touch control electrode layer, a pressure sensitivity electrode layer lay respectively at the relative both sides of described insulating medium layer;
Wherein, described touch control electrode layer comprises the touch control electrode that many group insulation are crisscross arranged, in order to detect the position of a touch signal, described pressure sensitivity electrode layer comprises at least one pressure sensitivity electrode and many pressure sensitivity signal wires, described pressure sensitivity electrode is corresponding with at least part of described touch control electrode to be arranged, its relative two ends are electrically connected to a signal transacting center respectively by described pressure sensitivity signal wire, and detecting touches the resistance change situation of front and back, in order to judge the pressing power size of described touch signal, and the described touch control electrode that should arrange with pressure sensitivity electrode pair is also in order to carry out a temperature compensation to described pressure sensitivity electrode.
2. three-dimensional touch panel as claimed in claim 1, it is characterized in that: described touch control electrode comprises the many groups first direction electrode and many group second direction electrodes that insulate and be crisscross arranged, often organize first direction electrode to comprise the multiple first direction electrode block laid along first direction interval and be connected two adjacent described first direction electrode blocks respectively with many first connecting lines, often organize second direction electrode and comprise the multiple second direction electrode blocks be laid in along second direction interval between two adjacent first direction electrodes; Described pressure sensitivity electrode is with first direction electrode described at least one group or second direction electrode block described at least one is corresponding arranges, and with the described first direction electrode that described pressure sensitivity electrode pair should be arranged or the corresponding described second direction electrode block arranged in order to carry out a temperature compensation to described pressure sensitivity electrode.
3. three-dimensional touch panel as claimed in claim 2, it is characterized in that: described three-dimensional touch panel comprises many secondary signal lines, when described pressure sensitivity electrode be arrange with described at least one, second direction electrode block is corresponding time, the described two ends relative with the second direction electrode block that pressure sensitivity electrode pair should be arranged are connected to described signal transacting center respectively by described secondary signal line.
4. three-dimensional touch panel as claimed in claim 3, it is characterized in that: described three-dimensional touch panel comprises many first signal wires further, one end of described first direction electrode or relative two ends are connected to described signal transacting center respectively by described first signal wire.
5. three-dimensional touch panel as claimed in claim 3, is characterized in that: described first direction electrode block and described second direction electrode block are comb-like pattern, and is embedded mutually and puts.
6. three-dimensional touch panel as claimed in claim 3, it is characterized in that: the material of described pressure sensitivity electrode is identical with the material of the corresponding described second direction electrode block arranged, and described pressure sensitivity electrode carries out described temperature compensation with the corresponding described second direction electrode block arranged by the mode being connected to same Wheatstone bridge.
7. three-dimensional touch panel as claimed in claim 3, is characterized in that: the pattern of described pressure sensitivity electrode is not identical with the pattern of the corresponding described second direction electrode block arranged, and carries out described temperature compensation by the mode that a value subtracts.
8. three-dimensional touch panel as claimed in claim 7, is characterized in that: the pattern of described pressure sensitivity electrode is by radial, the convoluted of a pressure drag material conductive line bends or broken line type, and the corresponding described second direction electrode block pattern arranged is block structure.
9. three-dimensional touch panel as claimed in claim 3, is characterized in that: described pressure sensitivity electrode and described second direction electrode block positive and negative temperature coefficient materials each other, meet α between the two
pressure/ α
touch=(ρ
0 pressurel
pressure/ S
pressure)/(ρ
0 touchesl
touch/ S
touch) time, described second direction electrode block is in order to carry out temperature compensation to described pressure sensitivity electrode;
Wherein, L
pressure, S
pressure, ρ
0 pressurerepresent length, area, the resistivity of pressure sensitivity electrode respectively, L
touch, S
touch, ρ
0 touchesrepresent length, area, the resistivity of second direction electrode block respectively, α
pressurerepresent the temperature coefficient of the material forming described pressure sensitivity electrode, α
touchrepresent the temperature coefficient of the material forming described second direction electrode block.
10. the three-dimensional touch panel according to any one of claim 6-9, is characterized in that: described pressure sensitivity electrode is 25mm with the area of the corresponding described second direction electrode block arranged
2~ 225mm
2.
11. three-dimensional touch panels as claimed in claim 3, is characterized in that: described pressure sensitivity electrode is identical with the corresponding described second direction electrode block pattern arranged, and material is not identical, and carries out described temperature compensation by the mode that a value subtracts.
12. three-dimensional touch panels as claimed in claim 2, it is characterized in that: described three-dimensional touch panel comprises many first signal wires, when described pressure sensitivity electrode is with when described at least one group, first direction electrode pair should be arranged, the two ends relative with the described first direction electrode that described pressure sensitivity electrode pair should be arranged are connected to described signal transacting center respectively by described first signal wire.
13. three-dimensional touch panels as claimed in claim 12, it is characterized in that: described three-dimensional touch panel comprises at least one collets, often organize described second direction electrode also to comprise many second connecting lines and connect two adjacent second direction electrode blocks respectively, described collets are arranged between described first connecting line and described second connecting line to make described first direction electrode and described second direction electrode be electrically insulated.
14. three-dimensional touch panels as claimed in claim 12, it is characterized in that: described three-dimensional touch panel comprises many articles of the 3rd signal wires, one end of described second direction electrode or relative two ends are connected to described signal transacting center respectively by described 3rd signal wire.
15. three-dimensional touch panels as claimed in claim 12, is characterized in that: described contact panel comprises many secondary signal lines, one end of described second direction electrode block or relative two ends are connected to described signal transacting center respectively by described secondary signal line.
16. three-dimensional touch panels as claimed in claim 12, is characterized in that: described pressure sensitivity electrode and described first direction electrode positive and negative temperature coefficient materials each other, and the two pattern is identical and meet α
pressure/ α
touch=(ρ
0 pressure/ h
pressure)/(ρ
0 touches/ h
touch) time, described first direction electrode is in order to carry out a temperature compensation to described pressure sensitivity electrode;
Wherein, h
pressure, ρ
0 pressurerepresent thickness, the length of pressure sensitivity electrode respectively, h
pressure, ρ
0 pressurerepresent thickness, the length of first direction electrode respectively, α
pressurerepresent the temperature coefficient of the material forming described pressure sensitivity electrode, α
touchrepresent the temperature coefficient of the material forming described first direction electrode.
17. three-dimensional touch panels as claimed in claim 12, is characterized in that: described pressure sensitivity electrode is identical with the corresponding described first direction electrode pattern arranged, and material is not identical, and carries out described temperature compensation by the mode that a value subtracts.
18. three-dimensional touch panels as claimed in claim 1, is characterized in that: described insulating medium layer is a substrate, described touch control electrode layer and described pressure sensitivity electrode layer are the upper and lower surfaces being arranged at described substrate.
19. three-dimensional touch panels as claimed in claim 1, is characterized in that: described insulating medium layer is an optical cement; Described three-dimensional touch device also comprises a upper substrate and is positioned at the opposite side of described touch control electrode layer away from described optical cement; One infrabasal plate is positioned at the opposite side of described pressure sensitivity electrode layer away from described optical cement; Namely described touch control electrode layer is arranged at the lower surface of described upper substrate, and described pressure sensitivity electrode layer is arranged at the upper surface of described infrabasal plate, and described touch control electrode layer and described pressure sensitivity electrode layer are fitted by described optical cement again.
20. three-dimensional touch panels as claimed in claim 1, is characterized in that: described first direction electrode block and described first connecting line are formed in one structure.
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| CN105426005B (en) | 2018-09-28 |
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