CN204557435U - Transparent force - Google Patents

Abstract

The application relates to transparent force.A kind of transparent force of the power applied on the surface for checkout equipment.This transparent force comprises the transparent force sensitive membrane of the strain relief feature array had along first direction orientation.This transparent force sensitive membrane is formed by transparent piezoelectric material, and this transparent piezoelectric material presents the net charge significantly reduced when straining along principal direction.The problem that embodiment of the present disclosure solves is to provide a kind ofly can be determined and touch the size of power or the transparent force of degree that associate.The quantity of power and/or the equipment of position for utilizing power sensitive membrane to detect to be applied on equipment and system is there is provided according to a purposes of an embodiment of the present disclosure.

Description

Transparent force

Technical field

The application relates generally to power sensing, and is specifically related to utilize the power of the transparent force sensitive membrane with one or more strain relief feature to sense.

Background technology

Mobile device generally includes one or more assembly for providing user to input to equipment and display screen.In some cases, for user provides touch input to be favourable on the display of overlay device or the surface of other parts.Existence and position that some traditional touch sensors are configured to utilize capacitive sensing techniques to detect and touch on the surface.But many traditional touch sensors can not be determined and the size or the degree that touch the power associated.

Utility model content

An object of an embodiment of the present disclosure is to provide a kind ofly can be determined and touch the size of power or the transparent force of degree that associate.

An example embodiment comprises a kind of transparent force of the power on checkout equipment surface.The power applied can be because the touch on device outer surface causes.Described transparent force comprises the transparent force sensitive membrane of the slit features part array had along first direction orientation.Described transparent force sensitive membrane can be formed by transparent piezoelectric material, and described transparent piezoelectric material presents the net charge significantly reduced when straining along principal direction.Described force snesor can also comprise the display element that relative transparent power sensitive membrane side is arranged.Described force snesor can also be integrated in user input device, such as, comprise touch pad, tracking plate, keyboard etc.

In certain embodiments, described piezoelectric presents that depend on should nyctitropic charge polarity.In some cases, described piezoelectric presents positive charge when changing direction be bent upwards along first, and when along be generally perpendicular to first should nyctitropic second should change direction and be bent upwards time present negative charge.In certain embodiments, described piezoelectric is poly-L lactide or poly-D lactide polymer membrane material.Described piezoelectric can be the PLLA polymeric material being drawn as lamina membranacea.

Some example embodiment relate to the first electrode having and be arranged on transparent force sensitive membrane and the transparent force being arranged on the second electrode under transparent force sensitive membrane.Described sensor can also comprise the sensing circuit with the first electrode and the second electrode electric coupling.In certain embodiments, described sensing circuit is configured to the change detecting the electrical characteristics that transparent force sensitive membrane causes due to the power on described equipment.In certain embodiments, described electrical characteristics are electric charges.

Some example embodiment relate to a kind of transparent force for detecting the power on the equipment of being applied to, described transparent force comprises: the lid forming a part for the outside surface of described equipment, and to be arranged under described lid and to have the transparent force sensitive membrane of the strain relief feature array along first direction orientation.Described transparent force sensitive membrane can be formed by piezoelectric, and described piezoelectric presents the net charge significantly reduced when straining along principal direction.Described force snesor can also comprise the display element be arranged under described transparent force sensitive membrane.In some cases, described strain relief feature is the slit features part along described first direction orientation.Described strain relief feature can comprise the recess channel feature along described first direction orientation.In some cases, described strain relief feature can comprise the perforation feature arranged along described first direction.

Some example embodiment relate to a kind of transparent force, and described transparent force comprises the first transparent force sensitive membrane of the slit features part array had along first direction orientation.Described transparent force sensitive membrane can be formed by piezoelectric, and described piezoelectric presents the net charge significantly reduced when directed along the first principal direction.Described sensor can also comprise the second transparent force sensitive membrane of the slit features part array had along second direction orientation.Described second transparent force sensitive membrane can be formed by piezoelectric, and described piezoelectric presents the net charge significantly reduced when directed along the second principal direction.In some cases, described first direction is generally perpendicular to described second direction.In some cases, described first principal direction is generally perpendicular to described second principal direction.In certain embodiments, described first direction is from approximate 45 degree of described first principal direction, and described second direction is from approximate 45 degree of described second principal direction.

In certain embodiments, described sensor comprises the lid be arranged on described first transparent force sensitive membrane; And the display element be arranged under described second transparent force sensitive membrane, wherein said second transparent force sensitive membrane is arranged under described first transparent force sensitive membrane.Described sensor can also comprise the top electrodes be arranged on described first transparent force sensitive membrane, is arranged on the target under described first transparent force sensitive membrane, and is arranged on the bottom electrode under described second transparent force sensitive membrane.In some example embodiments, described sensor can also comprise the first Optical transparent adhesive be arranged between described top electrodes and described first transparent force sensitive membrane; And the second Optical transparent adhesive be arranged between described target and described first transparent force sensitive membrane.

In certain embodiments, described sensor comprises the sensing circuit being conductively coupled to described top electrodes, target and bottom electrode.Described sensing circuit can be configured to the change detecting the electrical characteristics that described first transparent force sensitive membrane and the second transparent force sensitive membrane cause due to the power on described equipment.In certain embodiments, described first transparent force sensitive membrane is configured to when producing electric charge perpendicular to during described first direction strain, and described second transparent force sensitive membrane is configured to when producing electric charge perpendicular to during described second direction strain.In some cases, described sensing circuit is configured to measure the size touched.

The quantity of power and/or the equipment of position for utilizing power sensitive membrane to detect to be applied on equipment and system is there is provided according to a technique effect of an embodiment of the present disclosure.

Accompanying drawing explanation

Fig. 1 depicts the exemplary electronic device with the force snesor be combined with display element.

Fig. 2 A-C depicts the example with the charge characteristic depending on the transparent force sensing film of answering nyctitropic charge polarity.

Fig. 3 A-B depicts to be had substantially along the power sensitive membrane of the strain relief feature array of Y-direction orientation.

Fig. 4 A-B depicts the power sensitive membrane with substantially directed in X direction strain relief feature array.

Fig. 5 A-C depicts the example of the stacking integrated power sensitive membrane with display.

Fig. 6 depicts the assembly of exemplary electronic device.

Embodiment

The cross reference of related application

This application claims that on April 7th, 2014 submits to and name is called the U.S. Provisional Patent Application No.61/976 of " Transparent Force Sensor with Strain Reliief ", 285, on January 13rd, 2014 submits to and name is called the U.S. Provisional Patent Application No.61/926 of " Force Sensor Using a Transparent Force-Sensitive Film ", 905, on February 7th, 2014 submits to and name is called the U.S. Provisional Patent Application No.61/937 of " Temperature Compensating Transparent Force Sensor ", 465, on February 12nd, 2014 submits to and name is called the U.S. Provisional Patent Application No.61/939 of " Temperature Compensating Transparent Force Sensor ", 257, on February 19th, 2014 submits to and name is called the U.S. Provisional Patent Application No.61/942 of " Multi-Layer Temperature Compensating Transparent Force Sensor ", the right of priority of 021, wherein it is all incorporated into this by reference in each application.

In following example describes, reference being made to accompanying drawing, by illustrating, the specific examples that can put into practice being shown in the accompanying drawings.Being appreciated that when not deviating from the scope of various example, other examples can being used and can structural change be carried out.

Example provided herein may be used for detecting and measure user to the power of the touch of equipment.Especially, this example comprises the quantity of power and/or the equipment of position for utilizing power sensitive membrane to detect to be applied on equipment and system.Example system can comprise the transparent force sensitive membrane for producing electric charge in response to the distortion of film.Some embodiments are relevant with force snesor, and described force snesor comprises one or more layer of the quantity for detecting the power the equipment of being applied to formed from transparent force sensitive membrane.In one example in which, transparent force sensitive membrane is integrated with the display element of electronic equipment or the display element of opposing electronic device is arranged.Electronic equipment can be such as mobile phone, wearable electronic, health monitoring device, tablet computing device, graphoscope, calculating input equipment (such as touch pad, keyboard or mouse etc.), touch pad or screen, one or more buttons etc.In some cases, transparent or nontransparent power sensitive membrane and non-display Components integration, to form touch sensitive surface on the surface at other of the surface of shell or equipment.In certain embodiments, other touch sensitive surface of power sensitive membrane and touch pad, contact panel or equipment are integrated.In one example in which, the touch pad of power sensitive membrane and notebook computer system is integrated.

Generally and widely, the force snesor determining the power touched can be utilized, at the display of electronic equipment, shell or other sensing touch on the surface.The size of the power estimated or degree can be used as input signal or the input data of electronic equipment.This can allow the multiple different input by single touch or input equipment, so that the response of equipment and/or output can with the power changes of input.Therefore, such as this can allow the first power being applied to set point to be interpreted as the first input type or order, second power (being quantitatively different from the first power) at identical point place is interpreted as the second input type or order simultaneously.Thus, even if they appear at identical point and can use identical input equipment, equipment can be different to the response of described two inputs or output.

Transparent force sensitive membrane normally presents in response to the distortion of film or deflection and the compliant materials of transformable electrical characteristics.Transparent force sensitive membrane can be formed by piezoelectricity, piezoresistive, resistive or other Strain sensing materials.The resistive film of transparent electrical can by being formed by transparent conductive material coated substrate.Possible transparent conductive material such as comprises polyethylene dioxythiophene (PEDOT), indium tin oxide (ITO), carbon nano-tube, Graphene, nano silver wire, other metal nanometer lines etc.Possible backing material such as comprises the transparent polymer of glass or picture polyethylene terephthalate (PET) or cyclic olefin polymer (COP).Usually, when piezoresistive or resistive film strain, the resistance of film changes according to strain.This resistance can adopt circuit to measure.Like this, transparent piezoresistive or resistive film can use in the mode similar with strainmeter.If do not need transparent, then can use other membrane materials, such as, comprise the constantan (Constantan) for conducting film and Karma (Karma) alloy, and polyimide can be used as substrate.Nontransparent application comprises the power sensing on tracking plate or the display element back side.

In certain embodiments, transparent force sensitive membrane presents the different charge polarity depending on membrane strain direction.Explain in more detail about Fig. 2 A-C as following, in some cases, when film to be bent upwards along principal direction or to be bent downwardly or to upward deflect or deflect down, film can present the net charge being roughly zero.In some cases, when straining along principal direction, film presents the net charge significantly reduced.Such as, compared with other directions, when straining in a main direction, film can present significantly less net charge.

In some cases, film can present that depend on should nyctitropic charge polarity.Such as, film can present the electric charge with the polarity depending on the direction bent relative to principal direction.Especially, when film is bent upwards with the first angle relative to principal direction, electric charge has the first polarity, and when film such as has second-phase reversed polarity when the direction contrary with the first angle is bent upwards with an angle.In the example shown in, principal direction can from X and the approximate 45 degree of orientations of Y-direction (perpendicular to one another).Be bent upwards the surface charge that film can cause having the first polarity (such as, plus or minus) in X direction.The surface charge that film can cause having second-phase reversed polarity (such as, negative or positive) is bent upwards along Y-direction (perpendicular to X-direction).The example hyaline membrane presenting these characteristics comprises polylactide polymer, such as poly-L lactide (PLLA) and poly-D lactide (PDLA) polymkeric substance etc.Usually, transparent and nontransparent power sensitive membrane can be called " power sensitive membrane " at this or be called simply " film ".

In certain embodiments, power sensitive membrane is patterned as line, pixel or other geometric element arrays, and described line, pixel or other geometric elements are referred to herein as membrane component.The region of membrane component or power sensitive membrane can also utilize conductive trace or Electrode connection to sensing circuit.Usually, power sensitive membrane presents the change of measurable electrical characteristics in response to the power be applied on equipment.In one example in which, with putting forth effort to be applied on equipment, one or more membrane component deflection or distortion.With one or more membrane component or membrane electrode telecommunication or the sensing circuit that is otherwise electrically connected, be configured to detect and measure film owing to deflecting the change of the electrical characteristics caused.Based on the electrical characteristics of the film measured, the quantity of the power of estimation can be calculated.In some cases, the size that the power indication equipment of estimation touches, and be used as the graphic user interface of equipment or otherwise input.

In some cases, power sensitive membrane is patterned as pixel element, and each pixel element comprises roughly along the trace array of a direction orientation.This configuration can be called piezoresistive or the configuration of resistive strainmeter.Usually, in this configuration, power sensitive membrane is the material that electrical response changes in strain.The change of resistance can be the change of the geometric configuration that the strain owing to applying causes.Such as, according to poisson effect, the increase area of section minimizing simultaneously of length can be there is.The change of the intrinsic resistance rate that the change of resistance can also cause due to the strain applied owing to material.Such as, the strain of applying can make electronics more easily or more difficult transition pass through material.The strain that group effect is all-in resistance along with the power owing to applying causes and changing.In addition, in piezoresistive or the configuration of resistive strainmeter, each pixel can be formed by the power sensitive membrane pattern aimed in response to the strain along specific axis.Such as, if will measure the strain along x-axis, then pixel should make its most of trace length aim at x-axis.

In certain embodiments, power sensitive membrane can be formed by solid material plate, and with the electrode pattern telecommunication be arranged on one or more surfaces of power sensitive membrane.Electrode such as may be used for the region of solid material plate to be electrically connected to sensing circuit.This configuration can be called piezoelectric strain configuration.In this configuration, when straining, power sensitive membrane can produce electric charge.Power sensitive membrane can also produce the electric charge of varying number according to the degree of strain.In some cases, whole total electrical charge is the superposition of the electric charge produced due to the strain along various axle.

One or more power sensitive membrane can be integrated or be attached to the display element of equipment with the display element of equipment, and this display element can comprise the sensor of other types.In a typical embodiment, display element also comprises the touch sensor being configured to the position detecting one or more touch.Utilize according to the touch sensor of embodiments more described here and one or more transparent force sensitive membrane, the position that can the display element of estimating apparatus touch and the power of size and touch.

Fig. 1 depicts the exemplary electronic device 100 with the force snesor be integrated in display element 110.In this example embodiment, electronic equipment 100 comprises the display element 110 be arranged in apparatus casing 101.Display element 110 can so-called display, and for content viewable being presented to the user of electronic equipment 100.Display element 110 can comprise various equipment, such as liquid crystal display (LCD), light emitting diode (LED) display, Organic Light Emitting Diode (OLED) display etc.Explain in more detail as following, electronic equipment also comprises the one or more transparent force sensed layer 150 integrated with display element 110.In some cases, display element 110 be arranged on one or more transparent force sensed layer side on or to arrange relative to one or more transparent force sensed layer.Via other layers one or more such as comprising pressure-sensitive adhesive layer, plastic layer, glassy layer, conductive layer or other materials, one or more power sensitive layer can be attached to the surface of display element 110.In addition, describe in more detail about Fig. 5 A-C as following, more than one power sensitive membrane can be used to form the force snesor integrated with the display element 110 of electronic equipment 100.

As previously mentioned, transparent force sensing film can present the different charge polarity depending on membrane strain direction.Fig. 2 A-C depicts the example for having the charge characteristic depending on transparent force sensing film (film 200) of answering nyctitropic charge polarity.In the following examples, film 200 is the PLLA piezoelectric films stretched along principal direction indicated by tensor (tensor), and principal direction 210 is shown in Fig. 2 A-C.In some cases, the orientation of principal direction is the drawing process due to the polymer chain along single (master) direction aligned in general film.

As also illustrated in figs. 2 a-b, film 200 produces to have and depends on the surface charge of strain facies for the opposed polarity in the direction of principal direction 210.In this example embodiment, be bent downwardly in X direction in response to film 200, film 200 produces positive charge (+) on the top surface of film 200.In response to this deflection, also on the basal surface of film 200, produce negative charge (-).

As shown in Figure 2 B, when film 200 is bent downwardly along Y-direction, charge polarity reverses.Especially, be bent downwardly along Y-direction in response to film 200, film 200 produces negative charge (-) on the top surface of film 200.In response to this deflection, also on the basal surface of film 200, produce positive charge (+).Although Fig. 2 A-B depicts the charge characteristic of film 200 when being bent downwardly, when film 200 is bent upwards along X or Y-direction, similar reversed polarity can be caused.

In this example embodiment, if film 200 bends up or down along principal direction 210, then zero net charge is produced.In some cases, when straining along principal direction 210, film 200 presents the net charge significantly reduced.The uniaxial strain characteristic of film 200 can be the orientation due to the polymer chain substantially aimed at principal direction 210.Principal direction 210 is drawn as from approximate 45 degree of X and Y-direction in Fig. 2 A-C, X and Y-direction cardinal principle perpendicular to one another, and edge-oriented usually along rectangular slab.But this only actually is example, and in other embodiments, principal direction 210 can difference directed along relative to X and Y-direction, and film 200 can be formed by non-rectangle, bending or difform plate.

And as shown in Figure 2 C, if film 200 is all bent downwardly at X and Y-direction, then the opposite charges produced can cancel each other out substantially.In this example embodiment, in x and y direction substantially equal bend the top surface of film 200 and basal surface cause zero or be roughly zero net charge.The shape that this deflection causes can be described as cheese, canopy shape, spill or convex, and this depends on the context of description.

If film 200 is used as the power sensitive membrane in touch sensor application, then zero net charge characteristic of the film 200 drawn as Fig. 2 C can be less desirable.Such as, the touch that equipment surface occurs can make film be deformed into common spill or depression.Because the electric charge obtained is zero net charge (or significantly being reduced by net charge effect) substantially, the sensing electronic circuit being couple to film may not detect the appearance of touch and/or the size of touch force.

A solution of this problem can be to provide the strain relief feature array of a direction orientation along power sensitive membrane.Fig. 3 A-B and Fig. 4 A-B depicts to be had substantially along the power sensitive membrane of the strain relief feature array of X or Y-direction orientation.By comprising one or more strain relief feature in power sensitive membrane, the strain in film can be isolated single direction substantially.As the description in more detail of the following configuration of the sensor about Fig. 5 A-C, one or more power sensitive membrane with strain relief feature can be used to the appearance and the size that detect touch force, and do not have the above restriction described about Fig. 2 C.

Fig. 3 A-B depicts the power sensitive membrane (film 300) formed by piezoelectric, described piezoelectric presents zero charge or significantly reduces net charge when straining along principal direction 310.As shown in Figure 3A, film 300 comprises the strain relief feature array being formed as cavity feature part.Although strain relief feature 302 is described as cavity feature part, the feature of other types also can be used.Such as, the gap of the other types that one or more directions elimination that this feature can be formed as recess channel feature, perforation feature or be formed as generally along in material film strains.

As the result of strain relief feature 302, film 300 can present net charge along first direction, and the net charge presenting zero along different second directions, be roughly zero or significantly reduce.As shown in Figure 3A, film 300 has substantially along the strain relief feature of Y-direction orientation.If film 300 is bent downwardly along Y-direction or deflects, then on the top surface of film 300, produce negative surface charge (-), and produce positive surface charge (+) on the basal surface of film 300.Similarly, be bent upwards can cause positive surface charge on the top along Y-direction, the basal surface of film 300 causes negative surface charge.

As shown in Figure 3 B, if film 300 is bent downwardly in X direction or deflects, then the net charge produce zero on the top surface and basal surface of film 300, being roughly zero or significantly reducing.Thus, strain relief feature can be used to carry out barrier film in response to the deflection substantially along single direction (being Y-direction in this case).As a result, the deflection occurred in x and y direction can not cause as above zero net charge discussed about Fig. 2 C.When detecting or measure the size of the touch force causing film 300 concave cheese to deflect, this can be favourable.

The similar configuration drawn in Fig. 4 A-B is only for having in X direction the film 400 of (instead of Y-direction) directed strain relief feature 402.Fig. 4 A-B also depict the power sensitive membrane (film 400) formed by piezoelectric, described piezoelectric presents zero or significantly reduces net charge when straining along principal direction 410 (not having strain relief feature).As shown in figures 4 a-b, film 400 bending or deflection in X direction causes just (or negative) electric charge on the surface of film 400.As shown in Figure 4 B, film along the bending of Y-direction or deflection cause on the surface of film 400 zero or be roughly zero net charge.Thus, in this example embodiment, the strain-responsive of film 400 can be isolated in X direction substantially.

Can be integrated in force snesor by the one or more power sensitive membrane described about Fig. 3 A-B and Fig. 4 A-B, this force snesor is configured to the size detecting and/or measure touch force.In a typical embodiment, the partly integrated or contiguous display element part of the display element of power sensitive membrane and equipment is placed, and described display element is referred to herein as " display is stacking " or simply " stacking ".Power sensitive membrane can be attached with display stacking integrated by such as stacking with being attached to display substrate or plate.Alternatively, in certain embodiments, power sensitive membrane can be placed on display stacking in.The example of the stacking integrated power sensitive membrane with display is provided about Fig. 5 A-C below.Although following example provides about with the stacking integrated power sensitive membrane of display, in other embodiments, power sensitive membrane also can be combined with the part except display is stacking of equipment.Such as, similar power sensitive membrane configuration can be integrated with non-display element (other touch sensitive surface etc. of such as tracking plate, touch pad or equipment).

Fig. 5 A depicts the example of the power sensitive membrane be integrated in display stacking 500.In this example embodiment, display stacking 500 comprises two the power sensitive membrane 510,520 be combined with display element 501.As mentioned above, display element 501 such as can comprise LCD display, light-emitting diode display, OLED display etc.In some cases, display stacking 500 is directly attached to the surface of display element 501.But, in other examples, between the display element 501 drawn in fig. 5 and stacking other assemblies of display, extra assembly or layer can be had.And, other assemblies one or more or layer can be arranged on the top of display stacking 500, such as, comprise cover glass layer, another sensor layer, optical adjustment layer or other component layer.

Form two power sensitive membrane 510,520 by the piezoelectric without the plate form eliminated, described piezoelectric is when the net charge presenting zero or significantly reduce when principal direction (519,529) strains.In this example embodiment, (without eliminating) piezoelectric presents that depend on should nyctitropic charge polarity.In this example embodiment, two power sensitive membrane 510,520 are included in strain relief feature directed in different directions from each other.Especially, power sensitive membrane 510 comprises substantially along the strain relief feature array of Y-direction orientation, and power sensitive membrane 520 comprises substantially directed in X direction strain relief feature array.Describe about Fig. 3 A-B and Fig. 4 A-B as above, utilize the film had along the strain relief feature of a direction orientation can help to isolate described film strain-responsive in the direction in which.Therefore, the power sensitive membrane 510 with the strain relief feature substantially aimed at Y-axis can be used to measure the strain mainly occurred in the Y direction, and isolates the strain occurred in a lateral direction in the direction of strain relief feature.Similarly, the power sensitive membrane 520 had along the strain relief feature of X-axis can be used to measure the strain mainly occurred in the X direction, eliminates simultaneously or minimize the strain in a lateral direction in the direction along strain relief feature.

In this example embodiment, also by directed differently from one another for the principal direction 519,529 of two power sensitive membrane 510,520.Especially, substantially to spend directed principal direction 519 from Y-axis-45, power sensitive membrane 510 is placed in stacking 500.Substantially to spend directed principal direction 529 from Y-axis+45, another power sensitive membrane 520 is placed in stacking 500.This configuration causes power sensitive membrane 510,520 to have identical direction of an electric field when straining.As a result, target (522b with 512a) can be connected or electric coupling in sensor.Although the principal direction 519 and 529 drawn in Fig. 5 A is usually with +/-45 degree of orientations, if target 522b and 512a is separate connection in sensor, principal direction also can be different directed.And, in some cases, if such as there is enough capacitive couplings in stacking 500, two electrode 522b and 512a need not be had.

In some cases, the strain of measuring in both X and Y-direction expects.Such as, when boundary condition can change, X and Y-direction strain and the more sane of the power be applied on stacking top surface can be represented and reproducible instruction.Such as, if stacking (plate shape) is only by contrary lateral support, then stacking mainly along unsupported bending shaft with present strain.Thus, as long as side supports, then straining is only non-zero along the axle being generally perpendicular to side.

Two power sensitive membrane 510,520 can be used to the size detecting and measure power on display stacking 500.Especially, two the power sensitive membrane 510,520 as configuration in stacking 500 of Fig. 5 A can be used to detect the depression caused by the touch on the surface of display stacking 500.And, by utilizing two power sensitive membrane 510,520 with strain relief feature oriented perpendicular to each other, the response that sensor deflects some can be improved.Such as, two power sensitive membrane 510,520 are utilized can to improve the reliability of the sensor can obeying one or more boundary condition, as mentioned above.

As shown in Figure 5A, stacking 500 other assemblies or layer of arranging in the configuration of example are included in.In stacking 500, Optical transparent adhesive (OCA) layer 511a, 511b are arranged on the either side of power sensitive membrane 510.Similarly, two OCA layers 521a, 521b are arranged on the either side of another power sensitive membrane 520.OCA layer 511a-b and 521a-b for boning or being connected to contiguous layer, to form stacking 500.

As shown in Figure 5A, stacking 500 also comprise the pair of electrode layers for each power sensitive membrane.Especially, two electrode layer 512a and 512b are arranged on the either side of power sensitive membrane 510.Similarly, two another electrode layers 522a, 522b are arranged on the either side of another power sensitive membrane 520.Electrode layer 512a-b and 522a-b can be operationally couple to the sensing circuit being configured to the change detecting the electrical specification (such as electric charge or electric current etc.) produced by the deflection of power sensitive membrane 510,520.Electrode layer 512a-b and 522a-b can by such as heavy and or the transparent conductive material that is formed in indium tin oxide (ITO) on substrate etc. formed.In this example embodiment, electrode layer 512a-b is formed on respective substrate layer 513a-b, and electrode layer 522a-b is formed on respective substrate layer 523a-b.Substrate layer 513a-b and 523a-b can be formed by polyethylene terephthalate's (PET) plate or other transparent plate materials.In this example embodiment, additional OCA layer 515 is for being bonded together the top of stacking 500 and base assemblies.In certain embodiments, substrate 523a can form the stacking lid of display.In other embodiments, substrate 523a is attached to independent cap member via other layers one or more.

Fig. 5 B-C depicts the alternative stack arrangement of example.As shown in Figure 5 B, stacking 530 comprise two the power sensitive membrane 540,550 integrated with display element 501.Be similar to that above two power sensitive membrane 540,550 are formed by piezoelectric about described in Fig. 5 A, piezoelectric is when the net charge that to present zero or significantly minimizing when principal direction (549,559) strain.And be similar to example above, each power sensitive membrane 540,550 comprises strain relief feature array oriented perpendicular to each other.Thus, stacking 530 the size detecting and measure touch force on stacking 530 can also be used to.

In the example drawn in figure 5b stacking 530, the either side of single substrate layer 545 forms electrode layer 552b and 542a.In one example in which, bilateral ITO technique (also referred to as DITO technique) is utilized to form electrode layer 552b and 542a.Such configuration reduces the number forming stacking required layer, and eliminate the needs to middle OCA layer when stacking top assembly and base assemblies bonding.Thus, stacking 530 of Fig. 5 B thickness can compared with stacking 500 of Fig. 5 A with minimizing.

As shown in Figure 5 B, stacking 530 also comprise OCA layer 541a and 541b on the either side being arranged on power sensitive membrane 540.Similarly, OCA layer 551a and 551b is arranged on the either side of another power sensitive membrane 550.Stacking 530 also comprise electrode layer 542a and 542b be arranged on power sensitive membrane 540 either side.Similarly, electrode layer 552a and 552b is arranged on the either side of another power sensitive membrane 550.Bottom electrode layer 542a and 542b is respectively formed on substrate layer 545 and 543.Similarly, top electrode layer 552a and 552b is respectively formed on substrate layer 553 and 545.Can utilize and be similar to above stacking 500 materials described about Fig. 5 A and technology formation OCA layer, electrode layer and substrate layer.In certain embodiments, upper substrate 553 can form the lid of display stacking 530.In other embodiments, upper substrate 553 is attached to independent cap member via other layers one or more.

Fig. 5 C depicts the 3rd example stacking 560.As shown in Figure 5 C, stacking 560 comprise two the power sensitive membrane 570,580 integrated with display element 501.Be similar to and describe about Fig. 5 A above, two power sensitive membrane 570,580 are formed by piezoelectric, described piezoelectric is when the net charge that present zero or significantly minimizing when principal direction (579,589) strain.And be similar to the example before two, each power sensitive membrane 570,580 comprises strain relief feature array oriented perpendicular to each other.Thus, stacking 560 the size detecting and measure touch force on stacking 560 can be also used to.

In the example drawn in figure 5 c stacking 560, two power sensitive membrane 570,580 are shared in the common electrode layer 592 that substrate layer 593 is formed.Common electrode layer 592 can be used as common ground or reference layer.Alternatively, external electrode layer 572 and 582 can be used as ground plane, and protects the intraware of stacking 560 from electrical Interference.This configuration further reduces the number forming stacking required layer, and eliminates the number needing the electrode layer formed.Thus, stacking 560 of Fig. 5 C the thickness can with minimizing is compared with stacking 500 of Fig. 5 A with stacking 530 of Fig. 5 B.

As shown in Figure 5 C, stacking 560 also comprise OCA layer 571a and 571b on the either side being arranged on power sensitive membrane 570.Similarly, OCA layer 581a and 581b is arranged on the either side of another power sensitive membrane 580.Stacking 560 also comprise electrode layer 572 and are arranged on the electrode layer 592 shared on power sensitive membrane 570 either side.Similarly, electrode layer 582 and shared electrode layer 592 are arranged on the either side of another power sensitive membrane 580.Bottom electrode layer 572 is formed on substrate layer 573, and top electrode layer 582 is formed on substrate layer 583.Can utilize and be similar to above stacking 500 materials described about Fig. 5 A and technology formation OCA layer, electrode layer and substrate layer.In certain embodiments, upper substrate 583 can form the lid of electronics stacking 560.In other embodiments, upper substrate 583 is attached to independent cap member via other layers one or more.

Fig. 6 depicts the assembly of exemplary electronic device 600.The diagram drawn in Fig. 6 can correspond to the assembly of above-mentioned portable electric appts (comprising the equipment 100 described in Fig. 1).But Fig. 6 more generally can also represent the equipment of the other types being configured to utilize force snesor.Such as, electronic equipment 600 can represent the subset of components for mobile phone, wearable electronic, health monitoring device, tablet computing device, notebook, desktop computer.

As shown in Figure 6, equipment 600 comprises the processing unit 602 being operably connected to computer memory 604 and computer-readable medium 606.Processing unit 602 can be operably connected to storer 604 and computer-readable medium 606 assembly via electronic busses or bridge.Processing unit 602 can comprise the one or more computer processor or microprocessor that are configured in response to computer-readable instruction executable operations.Processing unit 602 can comprise the CPU (central processing unit) (CPU) of equipment.Additionally or alternatively, processing unit 602 can comprise other processors in equipment, and described equipment comprises special IC (ASIC) and other microcontroller apparatus.

Storer 604 can comprise various types of non-transitory computer readable storage medium, such as comprise random access memory (RAM), ROM (read-only memory) (ROM), erasable and programable memory (such as, EPROM and EEPROM) or flash memory.Storer 604 is configured to store computer-readable instruction, sensor values and other permanent software elements.Computer-readable medium 606 also comprises various types of non-transitory computer readable storage medium, such as, comprise hard disk drive storage devices, solid storage device, Portable magnetic memory device or other similar equipment.Computer-readable medium 606 can also be configured to store computer-readable instruction, sensor values and other permanent software elements.

In this example embodiment, processing unit 602 is operated to read the computer-readable instruction be stored on storer 604 and/or computer-readable medium 606.Computer-readable instruction can make processing unit 602 be adapted to guidance or operate about sensing and display more than controlling.Computer-readable instruction can be provided as computer program, software application etc.

As shown in Figure 6, equipment 100 also comprises display 608 and input equipment 610.Display 608 can comprise the display element of liquid crystal display (LCD), Organic Light Emitting Diode (OLED) display, light emitting diode (LED) display, organic electroluminescent (OEL) display or other types.If display 608 is LCD, then display can also comprise the backlight assembly of the display brightness being controlled to provide different brackets.If display 608 is displays of OLED or LED type, then can be controlled the brightness of display by the electric signal controlling to be supplied to display element.

Input equipment 610 is configured to user's input to be supplied to equipment 100.Input equipment 610 can represent the equipment being configured to also user's input is supplied to the force snesor 620 of equipment 600, and equipment 610 also can be described as input equipment by vague generalization.Input equipment 610 such as can comprise touch button, keyboard, keypad or other touch input devices.Equipment 600 can comprise other input equipments, such as, comprise power knob, volume button, return (home) button, roller and camera button.

As shown in Figure 6, equipment also comprises the force snesor 620 that can be configured to detect and measure the power put in equipment surface.According to embodiments more described here, force snesor 620 can comprise at least one transparent force sensitive membrane, and the power that described transparent force sensitive membrane is configured in response to being applied in equipment surface relative to each other deflects.Example power sensitive membrane is described above about Fig. 2 A-C, 3A-B and 4A-B.According to embodiments more described here, force snesor 620 can comprise be incorporated into display stacking in and be configured to one or more power sensitive membrane of the touch on detection display device lid (glass).The example display describing the force snesor with combination above about the embodiment drawn in Fig. 5 A-C is stacking.

As shown in Figure 6, equipment 600 also comprises the sensing circuit 630 being operationally couple to force snesor 620.In certain embodiments, the change of the electrical characteristics that one or more transparent force sensitive membrane that sensing circuit 630 is configured to detecting sensor 620 cause due to the power on equipment.Such as, sensing circuit 630 can be couple to transparent force sensitive membrane via one or more electrode being operable, and comprises the circuit of the change of electric charge on the surface that is configured to detect transparent force sensitive membrane.This circuit can comprise and can be used as being configured to the electric charge totalizer of the subtle change in amplified current or the assembly of current integrator.Circuit can also comprise one or more analog-digital converter assembly, for converting charge simulation or voltage signal to digital signal or output.Circuit 630 can also comprise and is used to operating physical force sensor 620 and the output of sensing circuit 630 is delivered to the processing unit 602 of equipment 600 and/or one or more programmable component of storer 604 and storer.

Although describe the utility model with reference to various embodiment, be appreciated that these embodiments are illustrative, and the scope of the present disclosure is not limited thereto.Many mutation, amendment, interpolation and improvement are all possible.More generally, describe in the context of specific embodiments according to embodiment of the present disclosure.Can be separated or combination function with different term description or in various embodiment of the present disclosure with different steps.These and other mutation, amendment, interpolation and improvement can drop in the scope of the present disclosure of claim restriction subsequently.

Claims (20)

1. a transparent force for the touch force on checkout equipment surface, is characterized in that, described transparent force comprises:

Have the transparent force sensitive membrane of the slit features part array along first direction orientation, wherein said transparent force sensitive membrane is formed by piezoelectric, and described piezoelectric presents the net charge significantly reduced when straining along principal direction.

2. transparent force as claimed in claim 1, it is characterized in that, described transparent force also comprises the display element be arranged on described transparent force sensitive membrane side.

3. transparent force as claimed in claim 1, is characterized in that, described piezoelectric presents to depend on answers nyctitropic charge polarity.

4. transparent force as claimed in claim 1, it is characterized in that, described piezoelectric presents positive charge when changing direction be bent upwards along first, and when along be generally perpendicular to described first should nyctitropic second should change direction and be bent upwards time present negative charge.

5. transparent force as claimed in claim 1, it is characterized in that, described piezoelectric is poly-L lactide or poly-D lactide polymer membrane material.

6. transparent force as claimed in claim 1, it is characterized in that, described transparent force also comprises:

Be arranged on the first electrode on described transparent force sensitive membrane;

Be arranged on the second electrode under described transparent force sensitive membrane; And

With the sensing circuit of described first electrode and the second electrode electric coupling, wherein said sensing circuit is configured to the change detecting the electrical characteristics that described transparent force sensitive membrane causes due to the power on described equipment.

7. transparent force as claimed in claim 6, it is characterized in that, described electrical characteristics are electric charges.

8. for detecting a transparent force for the power on the equipment of being applied to, it is characterized in that, described transparent force comprises:

Form the lid of a part for the outside surface of described equipment;

To be arranged under described lid and there is the transparent force sensitive membrane of the strain relief feature array along first direction orientation, wherein said transparent force sensitive membrane is formed by piezoelectric, described piezoelectric presents the net charge significantly reduced when straining along principal direction, and

Be arranged on the display element under described transparent force sensitive membrane.

9. transparent force as claimed in claim 8, it is characterized in that, described strain relief feature is the slit features part along described first direction orientation.

10. transparent force as claimed in claim 8, it is characterized in that, described strain relief feature is the recess channel feature along described first direction orientation.

11. transparent force as claimed in claim 8, is characterized in that, described strain relief feature is the perforation feature arranged along described first direction.

The transparent force of 12. 1 kinds of touch forces on checkout equipment, is characterized in that, described transparent force comprises:

Have the first transparent force sensitive membrane of the slit features part array along first direction orientation, wherein said transparent force sensitive membrane is formed by piezoelectric, and described piezoelectric presents the net charge significantly reduced when directed along the first principal direction; And

Have the second transparent force sensitive membrane of the slit features part array along second direction orientation, wherein said second transparent force sensitive membrane is formed by piezoelectric, and described piezoelectric is when presenting along during the second principal direction strain the net charge significantly reduced.

13. transparent force as claimed in claim 12, it is characterized in that, described first direction is generally perpendicular to described second direction.

14. transparent force as claimed in claim 12, it is characterized in that, described first principal direction is generally perpendicular to described second principal direction.

15. transparent force as claimed in claim 12, is characterized in that, described first direction is from approximate 45 degree of described first principal direction, and described second direction is from approximate 45 degree of described second principal direction.

16. transparent force as claimed in claim 12, it is characterized in that, described transparent force also comprises:

Be arranged on the lid on described first transparent force sensitive membrane; And

Be arranged on the display element under described second transparent force sensitive membrane, wherein said second transparent force sensitive membrane is arranged under described first transparent force sensitive membrane.

17. transparent force as claimed in claim 12, it is characterized in that, described transparent force also comprises:

Be arranged on the top electrodes on described first transparent force sensitive membrane;

Be arranged on the target under described first transparent force sensitive membrane;

Be arranged on the bottom electrode under described second transparent force sensitive membrane; And

Be conductively coupled to the sensing circuit of described top electrodes, target and bottom electrode, wherein said sensing circuit is configured to the change detecting the electrical characteristics that described first transparent force sensitive membrane and the second transparent force sensitive membrane cause due to the power on described equipment.

18. transparent force as claimed in claim 17, it is characterized in that, described first transparent force sensitive membrane is configured to when producing electric charge perpendicular to during described first direction strain, and described second transparent force sensitive membrane is configured to when producing electric charge perpendicular to during described second direction strain.

19. transparent force as claimed in claim 17, is characterized in that, described sensing circuit is configured to measure the size touched.

20. transparent force as claimed in claim 17, it is characterized in that, described transparent force also comprises:

Be arranged on the first Optical transparent adhesive between described top electrodes and described first transparent force sensitive membrane; And

Be arranged on the second Optical transparent adhesive between described target and described first transparent force sensitive membrane.