CN113978085A - Induction surface structure, preparation method thereof and product with induction surface structure - Google Patents
Induction surface structure, preparation method thereof and product with induction surface structure Download PDFInfo
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- CN113978085A CN113978085A CN202111391074.9A CN202111391074A CN113978085A CN 113978085 A CN113978085 A CN 113978085A CN 202111391074 A CN202111391074 A CN 202111391074A CN 113978085 A CN113978085 A CN 113978085A
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Abstract
The invention relates to an induction surface structure, wherein the induction surface structure can be used as a product surface and comprises a surface layer and an induction signal module, the surface layer is arranged on one side of the induction signal module, which faces a user, the induction signal module comprises an induction layer, and when the user is away from the surface layer by a preset distance and/or acts on the surface layer, the induction layer correspondingly generates heat energy change and/or deformation to generate an induction electric signal so as to excite the product to make corresponding feedback. The sensing surface structure can be self-powered, and the sensing function can be realized without an external power supply. When the induction surface structure is not needed to be used, the induction surface structure can be directly hidden as the surface of a product, and the attractiveness of the product design is improved. The product with the induction surface structure adopts the induction surface structure as the outer surface of the product, and can enhance the technological sense and the aesthetic degree of product design. The preparation method provided by the invention has high controllability, and the obtained product with the induction surface structure has high stability and long service life.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of intelligent induction, in particular to an induction surface structure, a preparation method thereof and a product with the induction surface structure.
[ background of the invention ]
Along with the development of science and technology, the science and technology of products feels and more tends to the favor that integrated design more and more obtains the consumer, and it is future development direction to use intelligent interaction mode to realize the interaction. For the existing products, the interaction between the user and the products is solved through the schemes of entity buttons, touch screens and the like. The holding position needs to be reserved when the product is designed to entity button or touch-sensitive screen, and it has restricted product design scope, has also brought the degree of difficulty for product integrated design, influences the pleasing to the eye degree on product surface, can't satisfy the demand that the product was designed to science and technology sense.
[ summary of the invention ]
In view of the above problems, the present invention provides a novel sensing surface structure, a method for preparing the same, and a product having the sensing surface structure.
In order to solve the above technical problems, the present invention provides an inductive surface structure for a product surface, the inductive surface structure includes a surface layer and an inductive signal module, wherein the surface layer is disposed on a side of the inductive signal module facing a user, the inductive signal module includes an inductive layer, and when the user is at a predetermined distance from the surface layer and/or acts on the surface layer, the inductive layer generates an inductive electrical signal corresponding to a thermal energy change and/or deformation to excite the product to generate a corresponding feedback.
Preferably, the sensing signal module comprises two electrode layers arranged on two opposite surfaces of the sensing layer, the surface layer is arranged on one side of any one electrode layer far away from the other electrode layer, and the sensing layer generates a sensing electric signal and outputs the sensing electric signal to an external IC module through the electrode layers
Preferably, the sensing layer is formed in situ on one of the electrode layers.
Preferably, the sensing surface structure further comprises an adhesive layer disposed between the surface layer and the electrode layer.
Preferably, the surface layer, the adhesive layer, the electrode layer and the sensing layer all have visible light transmittance.
Preferably, the sensing layer comprises one or a combination of polyvinylidene fluoride, polyvinyl chloride, poly-gamma-methyl-L-glutamate, polycarbonate, polyvinylidene fluoride trifluoroethylene, polymethyl methacrylate and polytetrafluoroethylene.
Preferably, the surface layer is a flexible fabric layer, and the sensing layer generates a sensing electric signal corresponding to the change and/or deformation of heat energy; or the surface layer is made of rigid material, and the induction layer generates induction electric signals correspondingly when heat energy changes.
In order to solve the technical problems, the invention also provides the following scheme: a product having a sensing surface structure comprising a sensing surface structure as described above, said sensing surface structure serving as the outermost surface of the product that is exposed to the environment.
Preferably, the product having the sensing surface structure comprises a smart car, and the sensing surface structure is used as an interior decoration surface of the smart car.
In order to solve the technical problems, the invention also provides the following scheme: a method of making a sensing surface structure, comprising: providing an electrode layer, and forming an induction layer on the electrode layer; forming another electrode layer on the surface of the sensing layer far away from the electrode layer to obtain a sensing signal module; arranging a surface layer on one side of any one electrode layer far away from the other electrode layer to obtain a sensing surface structure for the surface of the product; when a user is at a preset distance from the surface layer and/or acts on the surface layer, the induction layer correspondingly deforms and/or changes heat energy to generate an induction electric signal, and the induction electric signal is led out through the electrode layer.
Compared with the prior art, the induction surface structure, the preparation method thereof and the product with the induction surface structure have the following beneficial effects:
the induction surface structure provided by the invention can be used as a product surface and can also be used as an instruction input device between a user and a product, the induction surface structure comprises a surface layer and an induction signal module, wherein the surface layer is arranged on one side of the induction signal module facing the user, the induction signal module comprises an induction layer, and when the user is away from the surface layer by a preset distance and/or acts on the surface layer, the induction layer correspondingly generates heat energy change and/or deformation to generate an induction electric signal, so that the product is stimulated to generate corresponding feedback. The induction surface has a simple structure, has a self-powered characteristic, does not need an external power supply, and simplifies the conducting circuit of the product, so that the cost is lower. Compared with the existing electronic screen interaction and image shooting interaction modes, the induction surface structure provided by the invention does not need to additionally occupy the product volume and does not influence the product appearance, so that the interaction experience between a user and a product can be greatly improved. When the induction surface structure is not needed to be used, the induction surface structure can be directly hidden as the surface of a product, and when the induction surface structure is used, a user can preset a distance from the surface layer or act on the surface layer, and the induction layer can correspondingly generate heat energy change and/or deformation to generate an induction electric signal, so that the product is excited to generate feedback, and interaction between the user and the product is realized.
The induction surface structure provided by the invention comprises two electrode layers arranged on two opposite surfaces of the induction layer, and the induction layer generates induction electric signals and then outputs the induction electric signals to an external IC module through the electrode layers, so that the output of the induction electric signals can be realized. The arrangement of the electrode layer improves the signal output stability of the induction signal module, and meanwhile, the structure of the induction signal module can be simplified, so that the large-scale production is easy.
In the invention, the induction layer is formed on the electrode layer in situ, so that the recombination between the induction layer and the electrode layer is better, and the induction signal module has better operation stability and longer service life.
The sensing surface structure further comprises a bonding layer, the bonding layer is arranged between the surface layer and the electrode layer, the bonding layer enables the surface layer and the sensing signal module to have better composite effect, and then the sensing layer can better acquire a corresponding interaction state when a user is away from the surface layer by a preset distance or acts on the surface layer, so that the sensing signal is correspondingly, sensitively and accurately output to an external IC module.
In order to improve the technological and user experience of the sensing surface structure, the sensing surface structure may have visible light transmittance, and at this time, the surface layer, the bonding layer, the electrode layer, and the sensing layer all have visible light transmittance.
The sensing surface structure has the characteristic of self power supply, and can further make the sensing more sensitive and stable aiming at the limitation of the material of the sensing layer. In addition, the sensing layer made of limited materials has the characteristics of flexibility and any size, so that the sensing signal module can be better compounded with the surface layer to obtain a light and thin sensing surface structure.
In the present invention, the sensing layer may be based on a piezoelectric effect or a pyroelectric effect to achieve generation of an induced electrical signal, and thus, the surface layer may be a flexible fabric layer or a rigid material layer. The limitation of different materials of the surface layer can meet the requirements of different application scenes. The surface layer and the induction layer can be mutually matched to better generate corresponding induction electric signals.
The invention also provides a product with the sensing surface structure, and the sensing surface structure is used as the outermost surface of the product exposed to the environment. The product with the induction surface structure provided by the invention has stronger decorative technological sense and increases the interaction experience of users. The induction surface structure is used for replacing the entity button, the use of a large display screen on the outermost surface of the product exposed in the environment can be reduced, the conductive circuit in the automobile is simplified, extra power supply is not needed, and the production cost can be reduced while the convenience degree of user interaction operation is improved. The induction surface structure and the product surface are integrated into a whole, the induction surface structure can be integrated with the operation function of the product to a uniform surface, seamless connection is achieved, and the attractiveness of decoration is improved. Furthermore, the sensing surface structure arranged on the outermost surface of the product exposed to the environment is activated by means of user approach, gestures, touch and the like when needed, and can be directly hidden when not needed, so that better use experience is provided for users.
The invention also provides a preparation method of the induction surface structure, which comprises the steps of providing an electrode layer, and forming an induction layer on the electrode layer; forming another electrode layer on one side of the sensing layer facing the user to obtain a sensing signal module; and arranging a surface layer on one side of the induction signal module facing to a user to obtain an induction surface structure for the surface of the product. The induction surface structure obtained by the preparation method can meet the requirement that when a user is at a preset distance from the surface layer and/or acts on the surface layer in the induction surface structure, the induction layer correspondingly deforms and/or changes heat energy to generate an induction electric signal, and the induction electric signal is led out through the electrode layer, the composite effect between the induction signal module and the surface layer and between the induction layer and the electrode layer can be better, the stability of the induction surface structure can be improved, and the service life of the induction surface structure can be prolonged. In addition, the preparation method has the characteristics of strong controllability of the preparation process and simple step flow.
[ description of the drawings ]
Fig. 1 is a schematic layer structure diagram of a sensing surface structure according to a first embodiment of the present invention.
FIG. 2 is a schematic layer structure diagram of a sensing surface structure according to some embodiments of the present invention.
FIG. 3 is a schematic layer structure diagram of a sensing surface structure according to further embodiments of the present invention.
Fig. 4 is a schematic diagram of the state of the pressing operation and the voltage change of the pressing test using the sensing surface structure provided by the first embodiment.
Fig. 5 is a schematic view of a stacked structure of a sensing surface structure according to a second embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a product with a sensing surface structure according to a third embodiment of the present invention.
Fig. 7 is a schematic distribution diagram of an intelligent sensing surface structure in an automobile according to a fourth embodiment of the present invention.
Fig. 8 is a schematic layer structure diagram of the sensing surface structure shown in fig. 7.
Fig. 9 is a schematic flow chart illustrating steps of a method for manufacturing a sensing surface structure according to a fifth embodiment of the present invention.
Fig. 10 is a flowchart illustrating a specific step of step S1 in the method for manufacturing the sensing surface structure shown in fig. 9.
Description of reference numerals:
10. sensing a surface structure; 11. a surface layer; 12. a sensing signal module; 19. an adhesive layer; 121. a first electrode layer; 122. a sensing layer; 123. a second electrode layer; 129. an electrode layer; h1, H2, user hand; l, the predetermined distance of the user from the surface layer 11.
20. Sensing a surface structure; 23. a packaging structure; 24. a conductive circuit; 29. an IC module;
30. a product having an inductive surface structure; 301. sensing a surface structure;
40. an intelligent automobile; 401. sensing a surface structure; 41. a surface layer; 42. a sensing signal module.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a first embodiment of the present invention provides a sensing surface structure 10, which can be used as a decorative surface of a product and also as an instruction input device between a user and the product. The sensing surface structure 10 comprises a surface layer 11 and a sensing signal module 12, wherein the surface layer 11 is disposed on a side of the sensing signal module 12 facing a user. When a user is at a predetermined distance L from or acting on the surface layer, the surface layer 11 may transmit a user interaction state to the sensing signal module 12. The induction signal module 12 generates an induction electric signal based on the acquired interactive operation state, and the induction electric signal can be sent to an external IC module, so as to output the induction electric signal of the interactive operation. The induced electrical signal may be a contact type piezoelectric signal, a piezoelectric signal generated by deformation of the inside of the induced signal module 12 due to pressing, or a pyroelectric signal generated by heat transfer to the induced signal module 12 when a user is at a predetermined distance from the surface layer 11.
As shown in FIG. 1, user hand H1 represents a user being a predetermined distance L from the surface layer 11, and user hand H2 represents a user acting on the surface layer 11, which may include user hand H2 contacting the surface layer 11, user hand H2 pressing the surface layer 11, and so forth. Wherein the predetermined distance L from the surface layer 11 can be adjusted based on the material and thickness of the surface layer, the sensing sensitivity of the sensing layer, etc.
In order to realize the operation induction of a user, a voltage comparison module can be arranged in the IC module, when the induced electric signal is higher than the reference voltage, a corresponding control instruction, such as an illumination signal, a volume signal, a window and the like, can be sent to the product, and the product can generate corresponding feedback operation after receiving the control instruction.
As shown in fig. 2, in some embodiments, an adhesive layer 19 is further disposed between the surface layer 11 and the sensing signal module 12, and the adhesive layer 19 is used for bonding the surface layer 11 and the sensing signal module 12. In particular, in order to make the sensing surface structure 10 visible light transparent, the adhesive layer 19 may be adhered using OCA optical glue,
as shown in fig. 3, in other embodiments, in order to obtain better detection and output of the interaction signal, the sensing signal module 12 further includes a sensing layer 122 and electrode layers 129 disposed on two opposite surfaces of the sensing layer 122, and the surface layer 11 is disposed on one side of any one of the electrode layers 129 away from the other electrode layer 129. Specifically, when a user is at a predetermined distance from the surface layer 12 and/or acts on the surface layer 12, the sensing layer 122 generates a sensing electric signal corresponding to the thermal energy change and/or deformation, so as to excite the product to generate a corresponding feedback. Specifically, the sensing layer 122 generates a sensing electrical signal, and outputs the sensing electrical signal to an external IC module through the electrode layer 129, and then outputs the sensing electrical signal to a control module of the product. The adhesive layer 19 is provided between the surface layer 11 and the electrode layer 129.
In connection with what is shown in fig. 3, two of the electrode layers 129 can be subdivided into a first electrode layer 121 and a second electrode layer 123. The sensing layer 122 can be formed in situ on the first electrode layer 121. The sensing layer 122 can generate a sensing electrical signal corresponding to the deformation or the heat energy change, and output the sensing electrical signal to the IC module through the conductive circuit connected to the electrode layer 129, thereby generating and outputting the sensing electrical signal. The adhesive layer 19 is provided between the surface layer 11 and the second electrode layer 123.
In order to adapt the sensing surface structure 10 for different usage scenarios, the surface layer 11 may be a flexible material or a rigid material. The material of the surface layer 11 may be specifically selected based on the magnitude of the ambient noise signal of the scene where the sensing surface structure 10 is used, that is, the signal variation amplitude generated by the heat change or deformation transmitted to the sensing signal module 12 through the surface layer 11 should be larger than the signal variation amplitude generated by the ambient noise.
When the surface layer 11 is made of a flexible material, the surface layer 11 may include a flexible fabric layer, and specific materials thereof may include, but are not limited to: one or more of polyester fabric, nylon fabric, cotton-flax fabric, thermoplastic polyurethane film, etc. The user may apply a force to the surface layer 11 by means of a press touch. At this time, the surface layer 11 and the sensing signal module 12 may be deformed correspondingly, and the sensing signal module 12 may output a corresponding sensing signal to the IC module based on the deformation, specifically, as shown in fig. 4, when the sensing signal module 12 is deformed by a pressing force, the piezoelectric signal output by the sensing signal module 12 is also changed. For example, in fig. 4, 5 times of pressing are performed between the 3 rd second and the 4 th second, and each time of pressing, the piezoelectric signal fluctuates for one, and when the amplitude of the fluctuation of the signal is larger than the amplitude of the change of the piezoelectric signal caused by the environmental noise, the piezoelectric signal can be identified by the IC signal.
In addition, when the surface layer 11 is made of a flexible material, a user can also conduct heat energy generated by the user to the induction signal module 12 through the surface layer 11 when the user is in a predetermined distance from or contacts the surface layer 11, so that the induction signal module 12 can generate voltage change based on pyroelectric response, and further send an induction electrical signal to the IC module.
When the surface layer 11 is made of a rigid material, specific materials thereof may include, but are not limited to: glass, polyvinyl chloride (PVC), polyethylene film (PE), Ethylene Vinyl Acetate (EVA), and the like. The user can contact the surface layer 11, so that the heat energy generated by the user when the user is in a predetermined distance or in contact with the surface layer 11 is conducted to the induction signal module 12 through the surface layer 11, and the induction signal module 12 correspondingly generates voltage change based on pyroelectricity, thereby sending an induction electric signal to the IC module. In order to make the pyroelectric effect of the sensing signal module 12 more sensitive and accurate, the thickness of the surface layer 11 may be defined. Specifically, when the surface layer 11 is made of glass, the thickness of the surface layer 11 is 0.3-0.6 mm, and the sensing signal module 12 can also output a sensing electrical signal.
Further, the sensing layer 122 may be defined as required by operating conditions. The sensing layer 122 is preferably a ferroelectric polymer thin film formed by in-situ polarization, and specifically, the sensing layer 122 is a piezoelectric film formed in-situ on one surface of the first electrode layer 121, and the piezoelectric film includes a first surface and a second surface opposite to each other, where the first surface is a surface close to the first electrode layer 121, and the second surface is a surface close to the second electrode layer 123. Making the first surface potential of the piezoelectric film zero during polarization; providing a first electric field and a second electric field at the side of the second surface of the piezoelectric film, wherein the potential of the first electric field is higher than that of the second electric field; the ambient gas on the side where the second surface of the piezoelectric film is located is ionized under the action of the first electric field, and the ambient gas passes through the second electric field and is gathered on the second surface of the piezoelectric film, so that an intra-film electric field along the thickness direction of the film is formed in the piezoelectric film, and the piezoelectric film is polarized to form the induction layer 122. It is understood that the ferroelectric polymer thin film is formed on the surface of the first electrode layer 121 by a wet chemical method such as chemical vapor deposition, coating, dip coating, etc., and thus a ferroelectric polymer thin film having a very thin and uniform thickness can be formed. Specifically, the sensing layer 122 may include, but is not limited to, one or a combination of polyvinylidene fluoride, polyvinyl chloride, poly- γ -methyl-L-glutamate, polycarbonate, polyvinylidene fluoride (PVDF), polyvinylidene fluoride trifluoroethylene (PVDF-TrFE), polymethyl methacrylate (PMMA), polytetrafluoroethylene TEFLON, and other copolymers.
The induction layer 122 obtained after the ferroelectric polymer film is polarized has both alpha-phase crystal grains and beta-phase crystal grains and amorphous substances, the content of the beta-phase corresponds to the piezoelectric effect of the induction layer 122, when the content of the beta-phase crystal grains in the total crystal grains is 60-70%, the polarized film has a better piezoelectric effect, and the piezoelectric effect of the polarized film is better when the content of the beta-phase is higher. However, excessive polarization can create unwanted excess charges, etc., which can easily recombine with other charges on the polymer surface, thereby affecting the performance of the resulting piezoelectric film. In the present embodiment, the sensing layer 122 is preferably polyvinylidene fluoride trifluoroethylene (PVDF-TrFE).
In order to better adapt to the sensing layer 122, the materials of the first electrode layer 121 and the second electrode layer 123 may further include any one or a combination of several of a metal film system, a carbon system, an oxide film system, other compound film systems, and a composite film system.
Wherein, the metal film system comprises any one or combination of several of aluminum, copper, silver, gold, nickel, platinum or chromium. In order to meet the requirement of the transparent sensing surface structure, when the first electrode layer 121 and the second electrode layer 123 are made of metal thin films and have a thickness range of 3-15 nm, the first electrode layer 121 and the second electrode layer 123 may have visible light transmittance.
The carbon-based material includes, for example, graphene, carbon nanotubes, and the like. Wherein the graphene is formed by sp from carbon atoms2The novel two-dimensional carbon nanomaterial with the hexagonal honeycomb lattice structure, which is composed of the hybrid tracks, has excellent light transmission and electrical conductivity, and is an ultra-flexible 'transparent' conductor. The carbon nanotube is a seamless hollow tube body formed by curling graphite sheets, and carbon atoms in the carbon nanotube are sp2The carbon nano tube has high electrical conductivity and thermal conductivity, and can be regulated and controlled by a preparation process to show semiconductivity or metallicity.
The oxide film system can include, for example, a Transparent Conductive Oxide (TCO) film, which specifically includes three major systems: in2O3Base film, SnO2Base film, ZnO base film, and novel TiO2A base film.
Other compounds may further include β -Ga2O3Is a wide-band gap compound, has a forbidden band width of 4.9eV, is considered to be a very good deep ultraviolet transparent conductive material, and has good chemical properties and thermal stability. The TiN thin film belongs to group IV transition metal nitride, and has metal crystal and covalent crystalThe common characteristics of high hardness, high wear resistance, low friction coefficient, corrosion resistance and the like have wide application prospect. But is itself a conductive opaque ceramic material that can only be made transparent if the film thickness is less than the visible wavelength.
The composite film system can further comprise the steps of stacking the material films, placing the metal layer in a specific substrate layer, and providing the stacked transparent conductive film which can meet the dual requirements of low square resistance and high transmittance. Compared with a single-layer doped oxide transparent conductive film, the resistivity of the novel laminated transparent conductive film is lower.
In order to prepare the electrode layer with transparency, the first electrode layer 121 and the second electrode layer 123 may be prepared by preparing transparent metal films and carbon films, such as a nano silver wire film, a metal mesh film, and the like, by technical means.
Specifically, in some embodiments of the present invention, the first electrode layer 121 is a copper metal film layer, and the second electrode layer 123 is nano silver, silver paste, or the like.
The induction surface structure provided by the embodiment does not need an external power supply, can generate induction electric signals based on the corresponding deformation and/or heat energy change of the induction layer, and realizes interaction of a user based on a preset distance from the surface layer, contact, touch pressing and the like. In addition, the sensing surface structure occupies small volume and the size of the sensing surface structure can be adjusted at will.
Referring to fig. 5, a sensing surface structure 20 according to a second embodiment of the present invention is further provided, which is different from the sensing surface structure 10 provided in the first embodiment in that: the sensing surface structure 20 further comprises a package structure 23 and a conductive trace 24. The package structure 23 can provide a support for the inductive signal module 12. Specifically, the encapsulation structure 23 may encapsulate the first electrode layer 121. The material of the package structure 23 may be polyethylene terephthalate (PET) or the like. The conductive trace 24 is electrically connected to the first electrode layer 121 and the second electrode layer 123, and can output the induced electrical signal generated by the induction layer 122 to an external IC module 29, so as to implement interactive control.
Referring to fig. 6, a third embodiment of the present invention provides a product 30 with a sensing surface structure, which includes a sensing surface structure 301, wherein the sensing surface structure 301 may be the sensing surface structure 10 and the sensing surface structure 20 as described in the first and second embodiments. The sensing surface structure 30 serves as the outermost surface of the product 30 having the sensing surface structure that is exposed to the environment. The outermost surface of the product exposed to the environment may include, for example, the outer surface of the product exposed to the outdoor environment, the outer surface of the product exposed to the indoor environment, and the outer surface of the product exposed to the environment of the space inside the product. The products 30 with inductive surface structures include smart furniture, smart cars, smart appliances, etc. The product 30 with the inductive surface structure may particularly have a flexible outer surface to better adapt the use operation of the user, providing the user with a better use experience.
Referring to fig. 7, a fourth embodiment of the present invention provides an intelligent vehicle 40, where the intelligent vehicle 40 includes a sensing surface structure 401, and the sensing surface structure 401 includes the sensing surface structure 10 and the sensing surface structure 20 according to the first embodiment and the second embodiment. The sensing surface structure 401 may be used as a decorative surface in an automobile. As shown in fig. 8, the sensing surface structure 401 includes a surface layer 41 and a sensing signal module 42 stacked together. The sensing surface structure 401 differs from the sensing surface structures 10 and 20 described above in that: the surface layer 41 comprises a flexible fabric. The sensing signal module 42 includes a PVDF piezoelectric film. In this embodiment, the smart car 40 uses the sensing surface structure 401 formed by combining the PVDF piezoelectric film and the flexible fabric as the car interior decoration surface, and when the interaction function is not needed, the sensing surface structure 401 can be hidden only as a part of the car interior decoration surface, so as to maintain the beauty, neatness and integration of the car interior decoration surface; when interaction is needed, a user may activate the sensing surface structure 401 by approaching, touching, or pressing touch, for example, to perform interaction.
The sensing surface structure 401 can also be integrated with all operational functions in the vehicle to seamlessly join the sensing surface structure 401 with the vehicle interior.
In some embodiments, the sensing surface structure 401 may be mounted on an instrument panel system surface, a door trim system surface, a ceiling system inner surface, a pillar trim system surface, a steering wheel surface, etc. of the vehicle, and the sensing surface structure 401 is integrally designed with the interior decoration surface of the smart car 40.
Referring to fig. 9, a fifth embodiment of the invention provides a method for preparing an inductive surface structure S50, which includes the following steps:
step S1, providing an electrode layer, and forming a sensing layer on the electrode layer; the sensing layer may have piezoelectric and/or pyroelectric properties.
In step S2, another electrode layer is formed on the side of the sensing layer away from the electrode layer to obtain a sensing signal module.
Step S3, arranging a surface layer on one side of any electrode layer far away from the other electrode layer to obtain a sensing surface structure for the surface of the product;
when a user is at a preset distance from the surface layer and/or acts on the surface layer, the induction layer correspondingly generates heat energy change and/or deformation to generate an induction electric signal, and the induction electric signal is led out through the electrode layer, so that the product is excited to generate corresponding feedback.
Specifically, either one of the two electrode layers is defined as a first electrode layer, and the other is defined as a second electrode layer. As can be appreciated. The above definitions of the first electrode layer and the second electrode layer are only examples and explanations, and do not limit the present invention. The above step S1 may be subdivided into the following steps as shown in fig. 10:
step S11, mixing the induction layer raw material with a solvent to form a suspension solution, and stirring until defoaming, to obtain a solution to be coated.
Step S12, blade-coating the liquid to be coated on the first electrode layer to form a wet film;
step S13, placing the first electrode layer and the wet film at 20-40 ℃ for vacuum drying to form a dry film on the first electrode layer;
step S14, placing the first electrode layer and the dry film at 130-150 ℃ for drying and annealing to form a crystallized film on the first electrode layer; and
step S15, in-situ polarization is performed on the crystalline film formed on the first electrode layer to form a desired sensing layer on the first electrode layer.
In step S1, the sensing layer material includes PVDF-TrFE material, and the solvent is preferably butanone solvent.
In the above steps S12 and S13, the thickness of the wet film formed by the corresponding doctor blade coating and the dry film obtained after drying the wet film is related to the mixing ratio of the PVDF-TrFE raw material and the butanone solvent.
In step S13, the first electrode layer and the wet film are dried at a low temperature, which is most preferably vacuum dried at 25 ℃. In step S14, the first electrode layer and the dry film are annealed at a high temperature, which may be specifically annealed at 140 ℃ to form a crystalline film on the first electrode layer.
In step S15, the in-situ polarization apparatus may be used to polarize the crystalline film, so as to improve the sensitivity of the obtained sensing layer.
In the above step S11-step S15, after a wet film is formed on the electrode layer by a doctor blade coating method, a desired sensing layer is formed in situ on the electrode layer after low-temperature baking, high-temperature annealing and in-situ polarization. In the preparation process, the induction layers with different crystallinities can be obtained by adjusting the proportion of the raw materials to the solvent, the annealing temperature and the polarization mode, so that the induction sensitivity is effectively adjusted, and the controllability of the finished product preparation is improved.
Further, in order to output the sensing electrical signal generated by the sensing layer, the step of forming the second electrode layer on the sensing layer in step S2 may specifically include:
the first scheme is as follows:
and uniformly brushing silver paste on the induction layer by a screen printing method, and drying to form a second electrode layer on the induction layer.
The specific drying temperature is 55-65 ℃, and the drying time is generally 15-20 min. The second electrode layer obtained was a silver layer.
Scheme II:
and uniformly covering the nano silver on the sensing layer by a spraying process so as to form a second electrode layer on the sensing layer.
Among them, the nano silver is preferably AgN.
The steps disclosed in the above first and second schemes are only exemplary and not limiting.
In order to make the stability of the sensing surface structure more excellent, after the step S3, the method may further include the following steps:
step S4, the first electrode layer and the second electrode layer are externally connected with conductive traces, and one surface of the first electrode layer away from the sensing layer is packaged to obtain the required sensing surface structure.
In step S4, polyethylene terephthalate (PET) may be used as a sealing material for sealing.
The induction surface structure prepared by the preparation method provided by the embodiment has the advantages of simple preparation flow and low cost, and is beneficial to large-scale production and use.
Secondly, as the polyvinylidene fluoride trifluoroethylene (PVDF-TrFE) raw material adopted in the preparation method of the induction surface structure has the characteristics of flexibility and any size, the induction surface structure prepared based on the method is easier to be compounded with flexible fabric, occupies smaller volume and can be more suitable for the intelligent induction surface structure of products.
Further, in this embodiment, by directly forming the required sensing layer in situ on the first electrode layer, the adhesion between the sensing layer and the first electrode layer is better, so that the product of the sensing surface structure is more stable and better, and the service life is longer.
In addition, the induction surface structure has the self-powered characteristic, and an external power supply is not needed, so that the circuit design of the intelligent induction surface structure can be simplified, and the cost of the intelligent induction surface structure is lower.
Compared with the prior art, the induction surface structure, the intelligent induction surface structure and the preparation method of the induction surface structure have the following beneficial effects:
the induction surface structure provided by the invention can be used as a product surface and can also be used as an instruction input device between a user and a product, the induction surface structure comprises a surface layer and an induction signal module, wherein the surface layer is arranged on one side of the induction signal module facing the user, the induction signal module comprises an induction layer, and when the user is away from the surface layer by a preset distance and/or acts on the surface layer, the induction layer correspondingly generates heat energy change and/or deformation to generate an induction electric signal, so that the product is stimulated to generate corresponding feedback. The induction surface has a simple structure, has a self-powered characteristic, does not need an external power supply, and simplifies the conducting circuit of the product, so that the cost is lower. Compared with the existing electronic screen interaction and image shooting interaction modes, the induction surface structure provided by the invention does not need to additionally occupy the product volume and does not influence the product appearance, so that the interaction experience between a user and a product can be greatly improved. When the induction surface structure is not needed to be used, the induction surface structure can be directly hidden as the surface of a product, and when the induction surface structure is used, a user can preset a distance from the surface layer or act on the surface layer, and the induction layer can correspondingly generate heat energy change and/or deformation to generate an induction electric signal, so that the product is excited to generate feedback, and interaction between the user and the product is realized.
The invention also provides a product with the sensing surface structure, and the sensing surface structure is used as the outermost surface of the product exposed to the environment. The product with the induction surface structure provided by the invention has stronger decorative technological sense and increases the interaction experience of users. The induction surface structure is used for replacing the entity button, the use of a large display screen on the outermost surface of the product exposed in the environment can be reduced, the conductive circuit in the automobile is simplified, extra power supply is not needed, and the production cost can be reduced while the convenience degree of user interaction operation is improved. The induction surface structure and the product surface are integrated into a whole, the induction surface structure can be integrated with the operation function of the product to a uniform surface, seamless connection is achieved, and the attractiveness of decoration is improved. Furthermore, the sensing surface structure arranged on the outermost surface of the product exposed to the environment is activated by means of user approach, gestures, touch and the like when needed, and can be directly hidden when not needed, so that better use experience is provided for users.
The invention also provides a preparation method of the induction surface structure, which comprises the steps of providing an electrode layer, and forming an induction layer on the electrode layer; forming another electrode layer on one side of the sensing layer facing the user to obtain a sensing signal module; and arranging a surface layer on one side of the induction signal module facing to a user to obtain an induction surface structure for the surface of the product. The induction surface structure obtained by the preparation method can meet the requirement that when a user is at a preset distance from the surface layer and/or acts on the surface layer in the induction surface structure, the induction layer correspondingly deforms and/or changes heat energy to generate an induction electric signal, and the induction electric signal is led out through the electrode layer, the composite effect between the induction signal module and the surface layer and between the induction layer and the electrode layer can be better, the stability of the induction surface structure can be improved, and the service life of the induction surface structure can be prolonged. In addition, the preparation method has the characteristics of strong controllability of the preparation process and simple step flow.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An inductive surface structure for a product surface, characterized by: the induction signal module comprises an induction layer, and when a user is at a preset distance from the surface layer and/or acts on the surface layer, the induction layer correspondingly generates heat energy change and/or deformation to generate an induction electric signal so as to excite a product to generate corresponding feedback.
2. The sensing surface structure of claim 1, wherein: the induction signal module comprises two electrode layers arranged on two opposite surfaces of the induction layer, the surface layer is arranged on one side, away from the other electrode layer, of any one electrode layer, and the induction layer generates an induction electric signal and then outputs the induction electric signal to the peripheral IC module through the electrode layers.
3. The sensing surface structure of claim 2, wherein: the sensing layer is formed in situ on one of the electrode layers.
4. The sensing surface structure of claim 2, wherein: the sensing surface structure further comprises an adhesive layer, wherein the adhesive layer is arranged between the surface layer and the electrode layer.
5. The sensing surface structure of claim 4, wherein: the surface layer, the bonding layer, the electrode layer and the sensing layer all have visible light transmittance.
6. The sensing surface structure of claim 1, wherein: the induction layer comprises one or a combination of more of polyvinylidene fluoride, polyvinyl chloride, poly-gamma-methyl-L-glutamate, polycarbonate, polyvinylidene fluoride trifluoroethylene, polymethyl methacrylate and polytetrafluoroethylene.
7. The sensing surface structure of claim 1, wherein: the surface layer is a flexible fabric layer, and the induction layer correspondingly generates heat energy change and/or deformation to generate an induction electric signal; or the surface layer is a rigid material layer, and the induction layer correspondingly generates heat energy change to generate an induction electric signal.
8. A product having an inductive surface structure, characterized by: comprising a sensing surface structure according to any of claims 1-7, which is used as the outermost surface of the product exposed to the environment.
9. The product having a sensing surface structure as claimed in claim 8, wherein: the product having the inductive surface structure comprises a smart car, the inductive surface structure being used as a decorative surface in the car.
10. A method for preparing an inductive surface structure is characterized in that: the method comprises the following steps:
providing an electrode layer, and forming a sensing layer on the electrode layer;
forming another electrode layer on the surface of the sensing layer far away from the electrode layer to obtain a sensing signal module;
arranging a surface layer on one side of any one electrode layer far away from the other electrode layer to obtain a sensing surface structure for the surface of the product;
when a user is at a preset distance from the surface layer and/or acts on the surface layer, the induction layer correspondingly deforms and/or changes heat energy to generate induction electric signals, and the induction electric signals are led out through the electrode layer, so that the product is excited to generate corresponding feedback.
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Application publication date: 20220128 |