CN205121509U - Three -dimensional touch devices - Google Patents
Three -dimensional touch devices Download PDFInfo
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- CN205121509U CN205121509U CN201520757718.5U CN201520757718U CN205121509U CN 205121509 U CN205121509 U CN 205121509U CN 201520757718 U CN201520757718 U CN 201520757718U CN 205121509 U CN205121509 U CN 205121509U
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Abstract
The utility model relates to a three -dimensional touch devices, this three -dimensional touch devices include a base plate, and the definition has the touch -control district and walks the line district, an electrode layer, set up in on the base plate, the electrode layer includes many first direction touch the sensing electrodes, many second direction touch the sensing electrodes and a plurality of pressure the sensing electrodes, and first direction touch the sensing electrodes and second direction touch the sensing electrodes are used for listening a touch position, pressure the sensing electrodes is used for listening touch dynamics size, and wherein pressure the sensing electrodes lies in the edge of electrode layer, a line layer, set up in the line of walking of base plate is distinguished, includes many pressure the sensing electrodes connecting wires at least, pressure the sensing electrodes's both ends are passed through respectively pressure the sensing electrodes connecting wire electric connection is to a detection chip, in order to detect touch dynamics size. This three -dimensional touch devices can realize the function of the touch of sensing play simultaneously position and touch strength size, reaches three -dimensional touch -control.
Description
[technical field]
The utility model relates to a kind of contactor control device, particularly relates to a kind of three-dimensional touch device.
[background technology]
Touch screen technology was obtaining development at full speed in recent years, function aspects, there has been larger improvement product thickness aspect, such as plane single-point touch structure, plane Multi-point touch control structure, and the three-dimensional tactile screen structure etc. of touch location and pressure size can be detected simultaneously, the pressure-sensing of current exploitation has touch-sensing concurrently and is generally all formed on different substrates, so pressure-sensing and touch-sensing have upper and lower relation, such design needs electric signal penetrating between different substrate, the process penetrated will cause the decay of electric signal, meanwhile, pressure-sensing and touch-sensing are formed on different substrate, need to carry out twice different manufacturing process, cost and material aspect all do not have advantage to say.
How improving and to strengthen the user experience of touch-screen, making the integral thickness of product less, being the problem that touch-screen those skilled in the art pay close attention to, is also the development trend place of industry.
[utility model content]
Complicated for overcoming in prior art touch screen technology processing procedure, the problem that touch-control sensing effect is undesirable, the utility model provides a kind of and can simplify processing procedure and have the pressure-sensing contactor control device of better pressure-sensing and touch-control sensing effect simultaneously.
The scheme of the utility model technical solution problem is to provide a kind of three-dimensional touch device, and this three-dimensional touch device comprises a substrate, and definition has Touch Zone and cabling district; One electrode layer, be arranged on described substrate, described electrode layer comprises many first direction touch-sensing electrodes, many second direction touch-sensing electrodes and multiple pressure-sensing electrode, first direction touch-sensing electrode and second direction touch-sensing electrode detect a touch location, described pressure-sensing electrode detects a touching intensity size, and wherein pressure-sensing electrode is positioned at the edge of electrode layer; One line layer, be arranged at the cabling district of described substrate, at least comprise many pressure-sensing electrode connecting lines, the two ends of described pressure-sensing electrode are electrically connected to a detection chip respectively by described pressure-sensing electrode connecting line, to detect described touching intensity size.
Preferably, described pressure-sensing electrode be positioned at described electrode layer to corner location.
Preferably, described pressure-sensing electrode and described first direction touch-sensing electrode, described second direction touch-sensing electrode are electrically insulated.
Preferably, described line layer also comprises many touch-sensing electrode connecting lines, one end of described first direction touch-sensing electrode, described second direction touch-sensing electrode is electrically connected to described detection chip respectively by described touch-sensing electrode connecting line, to detect described touch location.
Preferably, the detection of described touching intensity size and described touch location detection can simultaneously or point sequential carry out.
Preferably, described first direction touch-sensing electrode, described second direction touch-sensing electrode and described pressure-sensing electrode are all arranged at the Touch Zone of described substrate.
Preferably, described first direction touch-sensing electrode, described second direction touch-sensing electrode are the Touch Zones being arranged at described substrate, and described pressure-sensing electrode is the cabling district being arranged at described substrate.
Preferably, one of them of at least one of them or the described second direction touch-sensing electrode of described first direction touch-sensing electrode is electrically connected at pressure-sensing electrode described in.
Preferably, the described first direction touch-sensing electrode or the described second direction touch-sensing electrode that are electrically connected at described pressure-sensing electrode described in are electrically connected to described detection chip by described pressure-sensing electrode connecting line.
Preferably, described first direction touch-sensing electrode at least one of them is electrically connected at pressure-sensing electrode described in, and one of them of described second direction touch-sensing electrode is electrically connected at pressure-sensing electrode described in another.
Preferably, described pressure-sensing electrode can also in order to detect touch location together with described first direction touch control electrode, described second direction touch control electrode.
Preferably, the detection of described touching intensity size and the detection of described touch location are that point sequential is carried out.
Preferably, described first direction touch-sensing electrode, described second direction touch-sensing electrode and described pressure-sensing potential are in the same surface of substrate.
Preferably, described first direction touch-sensing electrode, described second direction touch-sensing electrode and described pressure-sensing electrode are formed in same processing procedure with same material.
Preferably, described pressure-sensing electrode and described line layer are formed in same processing procedure with same material.
Preferably, described three-dimensional touch device also comprises a compensating electrode layer and is arranged at described substrate another surface relative to described electrode layer, wherein said compensating electrode layer comprises multiple compensating electrode and arranges with described pressure-sensing electrode one_to_one corresponding respectively, to carry out temperature compensation to described pressure-sensing electrode.
Preferably, described compensating electrode is same material with the corresponding described pressure-sensing electrode arranged.
Preferably, described pressure-sensing electrode and the described compensating electrode that arrange corresponding to it form wherein two resistance of a Wheatstone bridge, for detecting described touching intensity size, compensate the resistance change that described three-dimensional touch device causes due to temperature simultaneously.
Preferably, described three-dimensional touch device comprises the first reference resistance and the second reference resistance further, and with described pressure-sensing electrode and with it, the corresponding described compensating electrode arranged forms described Wheatstone bridge.
Preferably, the mode of described formation Wheatstone bridge is that described pressure-sensing electrode is connected with described first reference resistance, and the compensating electrode that described correspondence is arranged is connected with described second reference resistance.
Preferably, the mode of described formation Hui Sitong electrode is that described pressure-sensing electrode is connected with the described corresponding compensating electrode arranged, and described first reference resistance is connected with described second reference resistance.
Compared with prior art, a kind of three-dimensional touch device of the utility model is by mineralization pressure sensing electrode and touch-sensing electrode while of on a substrate, and pressure-sensing electrode is arranged on the edge of electrode layer, not only can ensure that the effective sensing region of touch-sensing electrode is not disturbed, and the size of touch pressure can be calculated accurately by each independently pressure-sensing electrode, improve the degree of accuracy detecting touch location and pressure size.Pressure-sensing electrode is arranged on the dark space effect that edge also can be avoided producing because being arranged on screen zone line, and the use sense affecting user is subject to.
The utility model also provides a kind of three-dimensional touch device, by pressure-sensing electrode and touch-sensing electrode array are connected together, and the touch-sensing electrode of correspondence does not directly connect FPC, but serial connection pressure-sensing electrode, FPC is connected by the connecting line of pressure-sensing electrode, make pressure-sensing electrode not only can detect the size of pressure, and can as one of them unit of touch-sensing electrode, as the touch-sensing electrode detecting touch location.Article two, pressure-sensing electrode connecting line Bonding pressure sensing electrode, when a wherein pressure-sensing Electrode connection thread breakage, an other pressure-sensing electrode connecting line can ensure the electric signal transmitting touch-sensing electrode equally, can not have influence on the function of touch-sensing electrode senses touch location.
Further, the utility model also provides a kind of three-dimensional touch device, by being different from another surface of electrode layer at substrate, set up a compensating electrode layer, compensating electrode layer comprises multiple compensating electrode and arranges to carry out temperature compensation to pressure-sensing electrode with multiple pressure-sensing electrode with same material one_to_one corresponding respectively, to increase the precision of pressing power size detecting.
[accompanying drawing explanation]
Fig. 1 is the detonation configuration schematic diagram of a kind of three-dimensional touch device first of the utility model embodiment.
Fig. 2 is the planar structure schematic diagram of the electrode layer of a kind of three-dimensional touch device first of the utility model embodiment.
Fig. 3 is the planar structure schematic diagram of a kind of three-dimensional touch device second of the utility model embodiment electrode layer.
Fig. 4 is the planar structure schematic diagram of a kind of three-dimensional touch device the 3rd of the utility model embodiment electrode layer.
Fig. 5 is the planar structure schematic diagram of a kind of three-dimensional touch device the 4th of the utility model embodiment electrode layer.
Fig. 6 is the planar structure schematic diagram of a kind of three-dimensional touch device the 5th of the utility model embodiment electrode layer.
Fig. 7 A is the planar structure schematic diagram of a kind of three-dimensional touch device the 6th of the utility model embodiment electrode layer;
Fig. 7 B is the diagrammatic cross-section of a kind of three-dimensional touch device the 6th of the utility model embodiment three-dimensional touch device along the I-I line of Fig. 7 A;
Fig. 7 C is the first connected mode of a kind of three-dimensional touch device the 6th of the utility model embodiment resistance R435, resistance R445, the first reference resistance Ra, the second reference resistance Rb;
Fig. 7 D is the second connected mode of a kind of three-dimensional touch device the 6th of the utility model embodiment resistance R435, resistance R445, the first reference resistance Ra, the second reference resistance Rb.
[embodiment]
In order to make the purpose of this utility model, technical scheme and advantage are clearly understood, below in conjunction with accompanying drawing and embodiment, are further elaborated to the utility model.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1 and Fig. 2, a kind of three-dimensional touch device 1 of the utility model first embodiment comprises a substrate 11, one electrode layer 13, with a line layer 14, wherein electrode layer 13 comprises many first direction touch-sensing electrodes 133 be arranged in parallel, many the second direction touch-sensing electrodes 131 and multiple pressure-sensing electrode 135 be arranged in parallel, first direction touch-sensing electrode 133 and described second direction touch-sensing electrode 131 detect touching position information, and pressure-sensing electrode 135 detects touching intensity size, first direction intersects with second direction, and first direction touch-sensing electrode 133 and second direction touch-sensing electrode 131 are electrically insulated by arranging the modes such as insulating mat (not shown) at crossover location, multiple pressure-sensing electrode 135 is the edges being positioned at electrode layer 13.
In the present embodiment, substrate 11 can be hard substrate, as glass, and tempered glass, sapphire glass etc.; Also can be flexible parent metal, as PEEK (polyetheretherketone, polyetheretherketone), PI (Polyimide, polyimide), PET (polyethyleneterephthalate, polyethylene terephthalate), PC (polycarbonate polycarbonate), PES (polyethylene glycol succinate, the materials such as the compound of PMMA (polymethylmethacrylate, polymethylmethacrylate) and arbitrarily both or many persons.Substrate 11 probably can be divided into Touch Zone 113 and cabling district 111 according to its subsequent applications.Wherein Touch Zone 113 is main in order to form induction electrode figure, and the visual windows of corresponding touch-screen, and cabling district 111 is main in order to form induction electrode connecting line, and the non-visual windows of corresponding touch-screen, namely light shield layer is had up and down in order to hide circuit in its relevant position, it should be noted that might not there be visual boundary in order to separate Touch Zone 113 and cabling district 111 on this substrate.
In the present embodiment, pressure-sensing electrode 135 and first direction touch-sensing electrode 133, second direction touch-sensing electrode 131 are all positioned at the Touch Zone 113 of substrate 11, and are mutually electrically insulated.Line layer 14 is arranged at the cabling district 111 of substrate 11, in the present embodiment, line layer 14 comprises many pressure-sensing electrode connecting lines 138, also comprise many touch-sensing electrode connecting lines 137, the two ends that each pressure-sensing electrode 135 is relative connect a pressure-sensing electrode connecting line 138 respectively, and one end of each first direction touch-sensing electrode 133, second direction touch-sensing electrode 131 connects a touch-sensing electrode connecting line 137 respectively.Pressure-sensing electrode connecting line 138 is communicated with FPC (FlexiblePrintedCircuitboard with touch-sensing electrode connecting line 137, flexible printed circuit board) 17 and detection chip 19, in order to a pressure signal and a position signalling are passed to described detection chip.The material of pressure-sensing electrode connecting line 138 and/or touch-sensing electrode connecting line 137 can be metal or its alloys such as gold, silver, copper, iron, aluminium, molybdenum.
When ambient pressure presses, a kind of three-dimensional touch device 1 of the utility model comes the position of detected touch point by first direction touch-sensing electrode 133 and second direction touch-sensing electrode 131, and carrys out detected pressures size by pressure-sensing electrode 135 simultaneously.Or three-dimensional touch device 1 also point sequential can carry out the detection of position, touch point and touch pressure size.Because pressure-sensing electrode 135 is the edges being positioned at electrode layer 13, and be electrically insulated with first direction touch-sensing electrode 133, second direction touch-sensing electrode 131, the detection of the pressure signal detection impact on touch point position signalling is less, and the detection of three dimensional signal can be sensitiveer and quicker.
In processing procedure, electrode layer 13 can adopt the technological forming such as impression, silk-screen, etching, coating on the substrate 11.Pressure-sensing electrode 135 can with first direction touch-sensing electrode 133, second direction touch-sensing electrode 131 is positioned at the same surface of substrate 11, and formed in same processing procedure with same material, namely first direction touch-sensing electrode 133 can comprise multiple first direction touch-sensing electrode unit 1331 be cascaded particularly, second direction touch-sensing electrode 131 comprises multiple second direction touch-sensing electrode unit 1311 be cascaded, each first direction touch-sensing electrode unit 1331 and second direction touch-sensing electrode unit 1311 and pressure-sensing electrode 135 can be diamond shape, and in processing procedure, they are preferably and in same processing procedure, form rhombus electrod-array with same material, and only fetch bit in the rhombus electrode near edge as pressure-sensing electrode 135, namely pressure-sensing electrode 135 is positioned at the edge of electrode layer 13, such as surrounding, be preferably each pair of corner location, the pattern of the electrode layer 13 of Touch Zone 113 is jointly formed with corresponding first direction touch-sensing electrode unit 1331 and second direction touch-sensing electrode unit 1311.
Pressure-sensing electrode 135 is arranged on the edge of electrode layer 13, when ambient pressure presses, the alteration of form of device entirety can trigger multiple pressure-sensing electrode 135 simultaneously, according to the computing formula of systemic presupposition, in conjunction with the force value that multiple pressure-sensing electrode 135 be triggered senses, the size pressing strength can be calculated.Pressure-sensing electrode 135 is positioned at electrode layer 13 edge, namely the outside of first direction touch-sensing electrode 133 in order to sense plane position and second direction touch-sensing electrode 131 is positioned at, especially four positions to angle point are positioned at, less to the influential effect of first direction touch-sensing electrode 133 and second direction touch-sensing electrode 131 sensing touch position, the larger interference of signal can not be caused, and can prevent touch area from occurring dark space (region of position of touch can not be sensed), if pressure-sensing electrode 135 is distributed in centre, then the region of distribution pressure sensing electrode 135 cannot be formed coupling capacitance with the first direction touch-sensing electrode unit 1331 or second direction touch-sensing electrode unit 1311 being arranged at its surrounding and causes these region None-identified position of touch, form dark space.The complementation of pressure-sensing electrode 135 and first direction touch-sensing electrode unit 1331 and second direction touch-sensing electrode unit 1311 is arranged so that pressure-sensing electrode 135 and synchronously can be made with same material in processing procedure in order to the first direction touch-sensing electrode 133 of sense plane position, second direction touch-sensing electrode 131, save material, decrease processing procedure, can largely on improve working (machining) efficiency.
The material of each first direction touch-sensing electrode 133, second direction touch-sensing electrode 131 and pressure-sensing electrode 135 can be ITO (tin indium oxide), it can also be nano-silver thread, NANO CRYSTAL COPPER WIRE, Graphene, polyaniline, PEDOT (the derivant Polyglycolic acid fibre of polythiophene), PSS (kayexalate) electrically conducting transparent macromolecular material, carbon nano-tube, Graphene, metal grill etc.Above-mentioned processing procedure is only in order to illustrate processing procedure advantage of the present utility model, and what those skilled in the art can clearly know is that actual processing procedure is not as limit.The shape of pressure-sensing electrode 135, first direction touch-sensing electrode unit 1331, second direction touch-sensing electrode unit 1311 is not defined as rhombus, and pressure-sensing electrode 135 does not limit identical with the shape of first direction touch-sensing electrode unit 1331 or second direction touch-sensing electrode unit 1311 yet.
Refer to Fig. 3, in electrode layer 23 described in the utility model second embodiment, each first direction touch-sensing electrode unit 2331 and second direction touch-sensing unit 2311 are diamond shape, and each pressure-sensing electrode 335 be by a wire roundabout be bent into radial, pressure-sensing electrode 235 is positioned at the edge of electrode layer 23, better each pair of corner point.The pressure-sensing electrode 235 of radial setting more easily produces the change of shape when being subject to ambient pressure, be beneficial to the size that follow-up system detects acting force.
Refer to Fig. 4, in electrode layer 33 described in the utility model the 3rd embodiment, each first direction touch-sensing electrode unit 3331, second direction touch-sensing unit 3311 and pressure-sensing electrode 335 are petal-shaped, pressure-sensing electrode 335 is positioned at the edge of electrode layer 33, is preferably each pair of corner point.
Refer to Fig. 5, electrode layer 43 described in the utility model the 4th embodiment comprises the many articles of first direction touch-sensing electrodes 433 evenly arranged side by side, the many articles of second direction touch-sensing electrodes 431 and multiple pressure-sensing electrode 435 evenly arranged side by side.With the first embodiment unlike, in the present embodiment, pressure-sensing electrode 135, first direction touch-sensing electrode 133 and second direction touch-sensing electrode 131 are arranged at the Touch Zone 113 of substrate 11, and multiple pressure-sensing electrode 435 is the cabling districts 111 being arranged at substrate 11.When ambient pressure presses, a kind of three-dimensional touch device 4 of the utility model comes the position of detected touch point by the first direction touch-sensing electrode 433 and second direction touch-sensing electrode 431 being positioned at Touch Zone 113, and carrys out detected pressures size by pressure-sensing electrode 435.In the present embodiment, the shape of pressure-sensing electrode 435 can be rhombus, radial, petal-shaped or other arbitrary shapes.And because of pressure-sensing electrode 435 are the cabling districts 111 being positioned at substrate 11, rear extended meeting is hidden by a light shield layer and is not revealed in the visual windows of touch-screen, thus be not limited to make with transparent material, and it is in manufacturing process, goodly synchronously can also to be made with same material with first direction touch-sensing electrode 433, second direction touch-sensing electrode 431, or to be synchronously made with same material with pressure-sensing electrode connecting line 438, touch-sensing electrode connecting line 437.
Refer to Fig. 6, in electrode layer 53 described in the utility model the 5th embodiment, electrode layer 53 comprises many first direction touch-sensing electrodes 533, second direction touch-sensing electrode 531 and multiple pressure-sensing electrode 535, and wherein pressure-sensing electrode 535, first direction touch-sensing electrode 533 and second direction touch-sensing electrode 531 are all arranged on the Touch Zone 113 of substrate 11.In the present embodiment, first direction touch-sensing electrode 533 comprises multiple first direction touch-sensing electrode unit 5331 be cascaded, second direction touch-sensing electrode 531 comprises multiple second direction touch-sensing electrode unit 5311 be cascaded, pressure-sensing electrode 535 can be formed with same material with first direction touch-sensing electrode 533, second direction touch-sensing electrode 531 equally in same processing procedure, and processing procedure is simple.In this embodiment, at least one first direction touch-sensing electrode 533 is electrically connected at a pressure-sensing electrode 535, and namely at least one first direction touch-sensing electrode unit 5331 tandem is serially connected with a pressure-sensing electrode 535 further.Each pressure-sensing electrode 535 by two independently pressure-sensing electrode connecting line 538 be connected to FPC57, form loop.And be not connected separately FPC57 with the first direction touch-sensing electrode 533 that a pressure-sensing electrode 535 is electrically connected, but be connected to FPC57 by any pressure-sensing electrode connecting line 538 of pressure-sensing electrode 535 be serially connected with it, and by FPC by signal transmission to detection chip.Each second direction touch-sensing electrode 531 is connected to FPC57 with 533, the first direction touch-sensing electrode that other are not connected with pressure-sensing electrode 535 respectively by a touch-sensing electrode connecting line 537.Namely in design, at least one pressure-sensing electrode 535 can participate in the detection of touch location as a part at least one first direction touch-sensing electrode 537.Such design not only can save space, avoid reserving separately region to lay pressure-sensing electrode 535, and can make pressure-sensing electrode 535 not only can pressure sensor size, and touch-sensing electrode can be served as, play the double action of sensing touch position.In two pressure-sensing electrode connecting lines 538 of Bonding pressure sensing electrode 535 any one rupture after, can normal transmission signal because also remain one, so the function of first direction touch-sensing electrode array 533 sensing touch position can not be had influence on.Better can ensure the steady operation of system.
In other implementations, also can be that at least one second direction touch-sensing electrode 531 is electrically connected at a pressure-sensing electrode 535, and be connected to FPC57 by any pressure-sensing electrode connecting line 538 of the pressure-sensing electrode 535 be serially connected with it; Or at least one first direction touch-sensing electrode 533 and at least one second direction touch-sensing electrode 531 are connected in series different pressure-sensing electrodes 535 respectively.Generally speaking, the technical scheme of the present embodiment: one of them of at least one of them and/or the second direction touch-sensing electrode 531 of first direction touch-sensing electrode 533 is electrically connected a pressure-sensing electrode 535 respectively, and be connected to FPC57 by pressure-sensing electrode connecting line 538, can the saving of implementation space, and do not affect the detection of touch location and pressure size.
It is noted that when ambient pressure presses, the three-dimensional touch device of the present embodiment point sequential need carry out the detection of position, touch point and the detection of pressure size.
In previous embodiment of the present utility model, the detection of pressure size mainly utilizes the piezoresistive effect of pressure-sensing electrode material, the size of touching intensity is determined by the resistance change amount of pressure-sensing electrode before and after detection pressing, and at present due to the restriction of pressure-sensing electrode material, pressure-sensing electrode such as inevitably to be pointed at the impact of touching object temperature, produce the change of certain resistance value, and the resistance change brought by temperature variation can affect the precision to touching intensity size detection to a certain extent.
In order to compensate the impact of temperature, the utility model can in previous embodiment, on substrate 11 another surface relative to electrode layer 13,23,33,43,53, set up a compensating electrode layer, compensating electrode layer comprises multiple compensating electrode and arranges across substrate 11 one_to_one corresponding with multiple pressure-sensing electrode 135,235,335,435,535 respectively.In the utility model, corresponding setting refers to that each compensating electrode and each pressure-sensing electrode are vertical corresponding up and down in the quantity and distributing position of substrate 11 liang of apparent surfaces, and the shape of compensating electrode and pressure-sensing electrode is then unrestricted.
Refer to Fig. 7 A, the planar structure schematic diagram of a kind of three-dimensional touch device the 6th of the utility model embodiment electrode layer, and Fig. 7 B three-dimensional touch device is along the diagrammatic cross-section of the I-I line of Fig. 7 A.The utility model the 6th embodiment and the 4th embodiment unlike, three-dimensional touch device 1 more comprises a compensating electrode layer 44 and is arranged at substrate 11 another surface relative to electrode layer 43.Compensating electrode layer 44 comprises multiple compensating electrode 445, and wherein multiple compensating electrode 445 is identical with pressure-sensing electrode 435 material, and set-up mode is arrange across substrate one_to_one corresponding.In the utility model, the two ends that pressure-sensing electrode 435 is relative are electrically connected to detection chip 19 respectively by pressure-sensing electrode connecting line 438, and the two ends that correspondingly compensating electrode 445 is relative are also electrically connected to identical detection chip 19 respectively by compensating electrode connecting line (not shown), in this detection chip 19, comprise the first reference resistance Ra, the second reference resistance Rb and a multiplexer further.By the control of multiplexer, make pressure-sensing electrode 435 (R
435) and the corresponding compensating electrode 445 (R arranged with it
445) form Wheatstone bridge with resistance Ra, resistance Rb.
As shown in Fig. 7 C and Fig. 7 D, resistance R
435, resistance R
445, the first reference resistance Ra, the second reference resistance Rb connected mode can have two kinds.As seen in figure 7 c, resistance R
435one end be electrically connected at a power positive end VEX+, the other end is connected with the first reference resistance Ra; Resistance R
445one end be electrically connected at same power positive end VEX+, the other end is connected with the second reference resistance Rb; First reference resistance Ra, the second reference resistance Rb other end are electrically connected at the extreme VEX-of this power-(or ground connection), and a voltmeter is used for measuring resistance R
435, resistance R
445electric potential difference signal U0.Or as illustrated in fig. 7d, resistance R
435one end be electrically connected at a power positive end VEX+, the other end and resistance R
445series connection; One end of first reference resistance Ra is electrically connected at same power positive end VEX+, and the other end is connected with the second reference resistance Rb; Resistance R
445, the second reference resistance Rb the other end be electrically connected at the extreme VEX-of this power-(or ground connection) voltmeter be used for measuring resistance R
435, the first reference resistance Ra electric potential difference signal U0.
When without pressing force effect, each Wheatstone bridge is in equilibrium state.When being subject to pressing force effect, one or more pressure-sensing electrodes 435 and corresponding compensating electrode 445 resistance value arranged of corresponding position change, Wheatstone bridge balance is broken and causes output potential difference signal U0 to change, the change of the corresponding different resistance of different pressure, correspondingly also can produce different electric potential difference signals, therefore, namely can draw corresponding force value by calculating the electric potential difference signal U0 of Wheatstone bridge and process.
As shown in fig. 7c, resistance R
435, resistance R
445, resistance Ra and resistance Rb hinders and forms Wheatstone bridge, its relation can be expressed as:
R
435/Ra-R
445/Rb＝U0(P)；
As shown in Figure 7 D, resistance R
435, resistance R
445, resistance Ra and resistance Rb hinders and forms Wheatstone bridge, its relation can be expressed as:
R
435/R
445-Ra/Rb＝U0(Q)；
In the three-dimensional touch device of the utility model the 6th embodiment, the resistance R of pressure-sensing electrode 435
435and the resistance R of compensating electrode 445
445obtain by the following derivation of equation with the relation of temperature variation:
The computing formula of the resistance R of object is:
R＝ρL/S(1)；
Wherein, ρ is expressed as the resistivity of material of decomposition pressure sensing electrode 435, compensating electrode 445, L be pressure-sensing electrode 435 in the utility model, compensating electrode 445 along the length of direction of current, S is that pressure-sensing electrode 435, compensating electrode 445 are along the cross-sectional area of direction of current.
In the utility model, the temperature variant formula of electricalresistivityρ of the material of decomposition pressure sensing electrode 435, compensating electrode 445 is:
ρ
T＝ρ(1+αT)(2)；
Wherein, ρ is the resistivity of material of decomposition pressure sensing electrode 435, compensating electrode 445, and α is the temperature coefficient of material resistance, and T is temperature.
In conjunction with above-mentioned formula (1) and formula (2):
When environment temperature is T
0time (as T=0) time, the resistance value of object is:
R
T0＝ρL/S(3)；
When environment temperature is T
1time, the resistance value of object is:
R
T1＝ρL/S(1+α(T
1-T
0))(4)；
The Δ R of material resistance value temperature influence can be derived by above-mentioned formula (1)-Shi (4)
tformula (5) can be expressed as:
ΔR
T＝R
T1-R
T0
＝ρL/S(1+α(T
1-T
0))-ρL/S
＝αΔT(ρL/S)
＝ΔTα·R(5)；
Wherein, Δ T represents temperature variation.
In the three-dimensional touch device that the utility model the 6th embodiment provides, R in Wheatstone bridge
435, R
445, Ra and Rb relation represent shown in formula of as above stating (Q) and formula (P).
For formula (Q), when temperature variation (temperature variation is expressed as Δ T), the resistance change of pressure-sensing electrode 435 and the compensating electrode 445 that arrange corresponding to it is respectively such as formula shown in (6) and formula (7):
ΔR
T435＝ΔTα·R
435(6)；
ΔR
T445＝ΔTα·R
445(7)；
By above-mentioned formula (1)-Shi (7), the temperature influence of pressure-sensing electrode 435 and the compensating electrode 445 that arrange corresponding to it can be drawn and the resistance variations caused represents such as formula shown in (8):
As can be seen from formula (8), pressure-sensing electrode 435, compensating electrode 445 are made up of same material, and at identical temperature variation, formula (8) also can draw formula (9) further:
As can be seen from above-mentioned formula (9), according to the characteristic of temperature conduction,
Same material is under the impact of identical temperature variation Δ T, and its temperature coefficient α is identical, when pressure-sensing electrode 435, compensating electrode 445 adopt identical material, in the process of resistance measurement, temperature to pressure-sensing electrode 435,
The variation delta R of compensating electrode 445 resistance value
t435with Δ R
t445cancel out each other by the mode shown in formula (9), therefore, temperature is zero on the impact of pressure-sensing load module 10.
For formula (P), itself and formula (Q) difference when temperature variation is Δ T are:
Wherein, the concrete derivation of formula (10) is identical with formula (8) and formula (9), therefore, do not repeat them here.
From the result of above-mentioned formula (9) and formula (10), Fig. 7 C and the wheatstone bridge configuration shown in Fig. 7 D all make temperature to pressure-sensing electrode 435 and with it resistance value influences of the corresponding compensating electrode 445 arranged almost nil, thus realize complete temperature compensation.
In addition, according to the characteristic of power conduction, because pressure-sensing electrode 435, compensating electrode 445 points are located at the upper and lower surface of substrate 11, substrate 11 is after being subject to External Force Acting, upper and lower surface can produce compression and tensile deformation respectively, then pressure-sensing electrode 435 and the compensating electrode 445 that arrange corresponding to it can compress and tensile deformation because pressure produces respectively.Namely substrate 11 its levels after being subject to pressing acting force has deformation difference, and then makes also can produce deformation difference between the pressure-sensing electrode 435 of lower surface disposed thereon, compensating electrode 445.Further, different pressing powers, the levels of substrate 11 caused by it, pressure-sensing electrode 435 and also not identical with the deformation difference of its corresponding compensating electrode 445 arranged.For (9) formula, after being pressed:
Wherein Δ R
f(comprise Δ R
f435with Δ R
f435) what represent is that pressure-sensing electrode 435 and the compensating electrode 445 that arrange corresponding to it are stressed the resistance change affecting and produce.Usually after substrate 11 is pressed power effect, surface thereof produces compression deformation, another surface produces stretcher strain, the pressure-sensing electrode 435 (or compensating electrode 445) being then positioned at compression deformation surface and the compensating electrode 445 (or pressure-sensing electrode 435) being positioned at tensile deformation surface produce negative strain, normal strain, i.e. Δ R respectively
f435(or Δ R
f445) and Δ R
f445(or Δ R
f435) be respectively negative, positive number.
Namely, when without pressing force effect, Fig. 7 C and the Wheatstone bridge shown in Fig. 7 D are in equilibrium state U0=0.When being subject to pressing force effect, one or more resistance values of pressure-sensing electrode 435 and/or compensating electrode 445 change, like this, Wheatstone bridge balance is broken and causes output electric signal U0 to change: the power as pressed is comparatively large, then the resistance value of pressure-sensing electrode 435 and the compensating electrode 445 that arrange corresponding to it has larger variable quantity and Δ R
f435with Δ R
f445absolute value larger; On the contrary, if the power pressed is less, then the resistance value of pressure-sensing electrode 435 and the compensating electrode 445 that arrange corresponding to it has less variable quantity and Δ R
f435with Δ R
f445absolute value less.The change of different resistance correspond to different force value, therefore, by calculating the output signal U 0 of Wheatstone bridge and process, namely corresponding force value can be drawn.
Above-described embodiment, only be designed to prototype with the electrode layer of the 4th embodiment, another surface of electrode layer 43 is different from substrate 11, set up a compensating electrode layer 44, compensating electrode layer comprises multiple compensating electrode 445 and arranges to carry out temperature compensation to pressure-sensing electrode 435 with multiple pressure-sensing electrode 435 with same material one_to_one corresponding respectively.And content of the present utility model is not as limit, prototype can also be designed to the first to the 3rd embodiment or the arbitrary electrode layer of the 5th embodiment, sets up compensating electrode layer in the same way and realize temperature compensation.
Compared with prior art, a kind of three-dimensional touch device of the utility model is by etching mineralization pressure sensing electrode and touch-sensing electrode on a substrate simultaneously, and pressure-sensing electrode 135 is arranged on the edge of electrode layer, not only can ensure that the effective sensing region of touch-sensing electrode is not disturbed, and the size of touch pressure can be calculated accurately by each independently pressure-sensing electrode, improve the degree of accuracy detecting touch location and pressure size.Pressure-sensing electrode 135 is arranged on the dark space effect that edge also can be avoided producing because being arranged on screen zone line, and the use sense affecting user is subject to.
Further, the utility model also provides a kind of three-dimensional touch device, by pressure-sensing electrode and touch-sensing electrode array are connected together, and the touch-sensing electrode of correspondence does not directly connect FPC, but serial connection pressure-sensing electrode, connect FPC by the connecting line of pressure-sensing electrode, make pressure-sensing electrode not only can detect the size of pressure, and can as one of them unit of touch-sensing electrode, as the touch-sensing electrode detecting touch location.Article two, pressure-sensing electrode connecting line Bonding pressure sensing electrode, when a wherein pressure-sensing Electrode connection thread breakage, an other pressure-sensing electrode connecting line can ensure the electric signal transmitting touch-sensing electrode equally, can not have influence on the function of touch-sensing electrode senses touch location.
Further, the utility model also provides a kind of three-dimensional touch device, by being different from another surface of electrode layer at substrate, set up a compensating electrode layer, compensating electrode layer comprises multiple compensating electrode and arranges to carry out temperature compensation to pressure-sensing electrode with multiple pressure-sensing electrode with same material one_to_one corresponding respectively, to increase the precision of pressing power size detecting.
The foregoing is only the utility model preferred embodiment, not in order to limit the utility model, all any amendments done within the utility model principle, equivalent replacement and improvement etc. all should comprise within protection domain of the present utility model.
Claims (10)
1. a three-dimensional touch device, is characterized in that, comprising:
One substrate;
One electrode layer, be arranged on described substrate, described electrode layer comprises many first direction touch-sensing electrodes, many second direction touch-sensing electrodes and multiple pressure-sensing electrode, described first direction touch-sensing electrode and described second direction touch-sensing electrode detect a touch location, described pressure-sensing electrode detects a touching intensity size, and wherein said pressure-sensing electrode is positioned at the edge of described electrode layer; And
One compensating electrode layer is arranged at described substrate another surface relative to described electrode layer, wherein said compensating electrode layer comprises multiple compensating electrode and arranges with same material one_to_one corresponding with described pressure-sensing electrode respectively, to carry out temperature compensation to described pressure-sensing electrode.
2. three-dimensional touch device as claimed in claim 1, it is characterized in that: described pressure-sensing electrode and the described compensating electrode that arrange corresponding to it form wherein two resistance of a Wheatstone bridge, for detecting described touching intensity size, compensate the resistance change that described three-dimensional touch device causes due to temperature simultaneously.
3. three-dimensional touch device as claimed in claim 1, it is characterized in that: described substrate definition has Touch Zone and cabling district, described three-dimensional touch device also comprises a line layer, be arranged at the cabling district of described substrate, at least comprise many pressure-sensing electrode connecting lines, the two ends of described pressure-sensing electrode are electrically connected to a detection chip respectively by described pressure-sensing electrode connecting line, to detect described touching intensity size.
4. three-dimensional touch device as claimed in claim 3, is characterized in that: described pressure-sensing electrode and described first direction touch-sensing electrode, described second direction touch-sensing electrode are electrically insulated.
5. three-dimensional touch device as claimed in claim 4, it is characterized in that: described line layer also comprises many touch-sensing electrode connecting lines, one end of described first direction touch-sensing electrode, described second direction touch-sensing electrode is electrically connected to described detection chip respectively by described touch-sensing electrode connecting line, to detect described touch location.
6. three-dimensional touch device as claimed in claim 4, is characterized in that: described first direction touch-sensing electrode, described second direction touch-sensing electrode and described pressure-sensing electrode are all arranged at the Touch Zone of described substrate.
7. three-dimensional touch device as claimed in claim 4, it is characterized in that: described first direction touch-sensing electrode, described second direction touch-sensing electrode are the Touch Zones being arranged at described substrate, and described pressure-sensing electrode is the cabling district being arranged at described substrate.
8. three-dimensional touch device as claimed in claim 3, is characterized in that: one of them of at least one of them or the described second direction touch-sensing electrode of described first direction touch-sensing electrode is electrically connected at pressure-sensing electrode described in.
9. three-dimensional touch device as claimed in claim 8, is characterized in that: the described first direction touch-sensing electrode or the described second direction touch-sensing electrode that are electrically connected at described pressure-sensing electrode are electrically connected to described detection chip by described pressure-sensing electrode connecting line.
10. three-dimensional touch device as claimed in claim 3, it is characterized in that: described first direction touch-sensing electrode at least one of them is electrically connected at pressure-sensing electrode described in, and one of them of described second direction touch-sensing electrode is electrically connected at pressure-sensing electrode described in another.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520757718.5U CN205121509U (en) | 2015-08-26 | 2015-09-28 | Three -dimensional touch devices |
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| CN201520650642 | 2015-08-26 | ||
| CN2015206506426 | 2015-08-26 | ||
| CN201520757718.5U CN205121509U (en) | 2015-08-26 | 2015-09-28 | Three -dimensional touch devices |
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| CN205121509U true CN205121509U (en) | 2016-03-30 |
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| CN201520757718.5U Expired - Fee Related CN205121509U (en) | 2015-08-26 | 2015-09-28 | Three -dimensional touch devices |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105320354A (en) * | 2015-08-26 | 2016-02-10 | 宸鸿科技(厦门)有限公司 | A three-dimensional touch apparatus |
| TWI603242B (en) * | 2016-05-28 | 2017-10-21 | 業成光電（深圳）有限公司 | Touch panel, electronic device and method of three-point touch measuring |
| CN107949824A (en) * | 2016-06-15 | 2018-04-20 | 深圳市汇顶科技股份有限公司 | Pressure-detecting device, method, touch control device and electric terminal |
-
2015
- 2015-09-28 CN CN201520757718.5U patent/CN205121509U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105320354A (en) * | 2015-08-26 | 2016-02-10 | 宸鸿科技(厦门)有限公司 | A three-dimensional touch apparatus |
| CN105320354B (en) * | 2015-08-26 | 2018-11-23 | 宸鸿科技(厦门)有限公司 | A kind of three-dimensional touch device |
| TWI603242B (en) * | 2016-05-28 | 2017-10-21 | 業成光電（深圳）有限公司 | Touch panel, electronic device and method of three-point touch measuring |
| CN107949824A (en) * | 2016-06-15 | 2018-04-20 | 深圳市汇顶科技股份有限公司 | Pressure-detecting device, method, touch control device and electric terminal |
| CN107949824B (en) * | 2016-06-15 | 2021-07-20 | 深圳市汇顶科技股份有限公司 | Pressure detection device and method, touch control equipment and electronic terminal |
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