KR20200083238A - Information provision system using Transfomable grating complex and information provision method using same - Google Patents

Abstract

The present invention relates to an information provision system using a variable grating complex. The information provision system using the variable grating complex comprises: a producer module provided therein with a plurality of micro or nana particles being formed through magnetic assembly by a plurality of magnetic assemblies to be impregnated in a structure covered in a flexible base material, a relative position between the magnetic assemblies received in the base material and a relative position of the particles included in the magnetic assembly are changed when a form of the base material is changed by a load applied from the outside, so that a grating complex is provided to form a specific pattern representing the same of different structure color in the grating structure by input light by forming a grating structure with the particles having a crease shape of the same or different arrangement; and a user module for sensing color information of the structure color and pattern information of a color respectively or together to provide information of a target to a user. According to the present invention, a large number of information may be included in the grating complex by the number of cases which is increased according to a position of a magnetic assembly representing a structure color, an index of the structure color (RGB, 2^8*2^8*2^8), intensity of light (2^5), an angle of light, and a view angle of a user so that various information can be provided.

Description

Information provision system using Transfomable grating complex and information provision method using same}

The present invention relates to an information providing system using a variable grating complex and an information providing method using the same, and more specifically, a pattern including various structural colors expressed according to a change in the shape of the grating complex and various images formed by the structural colors. The present invention relates to an information providing system capable of delivering a larger amount of information and an information providing method using the information.

Color contains a myriad of information. Since it contains various information such as color, saturation, brightness, contrast, and wavelength, it is expected that existing counterfeit prevention measures can be sufficiently replaced if these information can be used properly.

In general, the method of realizing color is to transmit the light of its own light source to the color filters of red, green, and blue colors to realize the color, how to collide the ultraviolet rays from the plasma with the phosphor, and the light emitted according to the current flow in the material itself In contrast, a light-emitting method such as a method of mixing, or a reflective type method of using a photonic crystal to exclude or reflect light of a specific wavelength incident without its own light source, so that a structure color is expressed. Is known.

Among the methods of implementing such a color, the light emission type method is more widely known than the reflection type method, but has a serious problem of continuously supplying power for color filters and light emission, and the existing reflection type method using structural color is a color filter. Any color can be realized without it, so it is possible to implement an ultra-low power display with excellent outdoor visibility through a simple device manufacturing process.

However, the reflective method using a structural color has a disadvantage in that an image by a photonic crystal must maintain an overt shape in the presence of light. The characteristics of this reflective method are inappropriate to hide the necessary information for preventing forgery, which reduces the utilization of photonic crystals in the forgery prevention field, and the color displayed also varies depending on the illumination angle and viewing angle. The amount is also falling.

『Republic of Korea Registered Patent Publication No. 10-1672392, Name of invention: Photonic crystal display device (Announcement date: November 13, 2016, Applicant: Samsung Electronics Co., Ltd./Nanobrick Co., Ltd.)』

An object of the present invention is to provide an information providing system and an information providing method capable of delivering a larger amount of information using various structural colors expressed according to a change in the shape of a grating complex and various images formed by the structural colors. .

According to one aspect of the present invention for achieving this object, the present invention, in order to provide information of an object through color, a plurality of micro or nano particles are formed of a plurality of self-assembly by self-assembly to be flexible Impregnated with a structure wrapped around the base substrate, and when the shape of the base substrate is changed by a load applied from the outside, relative positions between the magnetic assemblies accommodated in the base substrate and each of the magnetic assemblies are included in the magnetic assemblies. By changing each, the particles form a grating structure having a wrinkle shape having the same or different arrangements, thereby providing a grating composite that appears to have the same or different structure color in the grating structure by incident light, thereby forming a specific pattern. Producer module; And a user module that senses the color information of the structural color and the pattern information of the color, respectively, or provides the information of the object to the user, and provides an information providing system using a variable grating complex.

According to another aspect of the invention, the present invention, in order to provide the information of the object through the color, the producer module is formed of a plurality of self-assembly by a plurality of micro- or nano-particles by self-assembly to a flexible base substrate When the shape of the base substrate is changed by the load applied from the outside, impregnated with the surrounding structure, the relative positions between the magnetic assemblies accommodated in the base substrate and the magnetic assemblies are respectively included, so that the relative positions of the particles change. By forming a wrinkled grating structure having the same or different arrangements of the particles, the same or different structural colors appear on the grating structure by incident light, thereby providing a grating composite forming a specific pattern; And a user module sensing the color information of the structural color and the pattern information of the color respectively or providing the information of the object to the user, and provides a method for providing information using a variable grating complex including a user module. .

According to the present invention has the following effects.

First, the number of cases that increase according to the position of the self-assembly where the structure color appears, the index of the structure color (RGB, 2 ⁸ *2 ⁸ *2 ⁸ ), the intensity of light (2 ⁵ ), the angle of light, and the viewing angle of the user By innumerable information can be included in the grating complex to provide more diverse information.

Second, the degree of grating can be adjusted according to the degree of bending and the degree of tension, and the color expressed according to the degree of grating also varies, so that more various colors can be expressed through the degree of bending or tension.

Third, due to the significant difference in elastic modulus between the base substrate and the corrugated grating structure, the grating structure reacts sensitively to external stimuli, thereby exhibiting structural colors according to various degrees of bending.

Fourth, by forming the refractive index of the base substrate and the self-assembly similarly, it is possible to actively control operations such as the visibility and hiding of the structure color according to the external stimulation, thereby maintaining a higher security.

Fifth, each of the structural colors can be expressed according to the anisotropic load as well as the anisotropic load applied to the base substrate, thereby providing various input-responsive grating composites.

Sixth, since a plurality of grating structures may be formed on one base substrate, a plurality of characters, images, bar-codes, QR-codes, etc., respectively matched to the shape change of the base substrate, etc. It can provide various types of information.

1 to 4 are views for explaining a method of manufacturing a variable grating composite according to an embodiment of the present invention.
5 to 20 are views for explaining the mechanical / optical properties of the variable grating composite according to an embodiment of the present invention.
21 and 25 are diagrams for explaining an information providing system and method using a variable grating composite according to an embodiment of the present invention.

A method for manufacturing the variable grating composite 100 of the present invention will be described with reference to FIGS. 1 to 4.

Referring to FIG. 1(a), in order to manufacture the variable grating composite 100, a color pattern that should appear through the grating structure is converted into a black and white image, thereby generating a binary pattern for printing a matrix structure of an inkjet printer ( S1100) At this time, as shown in FIG. 1(b), the basic pixel unit crystal structure for droplet-based binary pattern generation is a high aspect ratio coffee-ring shaped micro or nano structure. Here, the coffee-ring shape means a donut shape or a ring shape.

Thereafter, a suspension containing nanoparticles 111 to be used as the ink of the inkjet printer is prepared. (S1200) Here, the process of preparing a suspension containing nanoparticles 111 (S1200) is 300nm, 500nm, or 700nm. A process of extracting monodispersed silica pellets by centrifuging a mono-dispersed silica nanoparticle (20%, w/v) solution at 6500 rpm for 10 minutes (S1210) and solvent (S1220), which is a silica suspension by mixing the removed silica pellets with formamide, to form a nanoparticle suspension (S1220), and a sonicator to completely disperse the silica particles (111) in the prepared nanoparticle suspension. It includes the process of sonicating the solution using (S1230). At this time, the monodisperse silica nanoparticle solution is mixed with formamide for naturally evaporating distilled water having a particle 111 concentration of 20w%, and the ratio of water and formamide is preferably set to about 3:1.

Thereafter, the suspension is applied to prepare a wettability glass substrate GS. (S1300) Here, the process of preparing the wettability glass substrate GS (S1300) is a glass substrate that is not subjected to any chemical treatment. The process of preparing (GS) (S1310) and the process of preparing a glass substrate (GS) having increased hydrophilicity by treating a pirania solution on a glass substrate (GS) that is not chemically treated at all (S1320), Any one of the processes (S1330) of preparing the glass substrate GS having increased hydrophobicity by performing a silane treatment on the glass substrate GS which has not undergone chemical treatment is selectively included.

At this time, the contact angle for application together with the affinity of water of the above-described glass substrate GS plays an important role in forming the self-assembly 112 in a coffee-ring shape. Specifically, when the proportions of water, particles, and formamide, which are components of the suspension, are constant, the pattern formed according to the contact angle of the surface can be divided into three types. A pattern close to a monolayer is formed at a contact angle of 0° to 15°, a coffee-ring structure is formed to about 15° to 60°, and a dome structure is formed as above at a hydrophobic surface. .

In addition, briefly abbreviating the pirania cleaning process, the piranha solution composed of ammonium hydroxide (70 ml), hydrogen peroxide (70 ml) and deionized water (350 ml) is gradually heated to 190° C., and then the glass slide is heated. This is a process of immersing in the piranha solution for 1 hour, washing with deionized water and drying with N ₂ gas.

Referring to Figure 1 (c), by applying and printing a suspension containing the nanoparticles 111 prepared above on the wettable glass substrate (GS), by allowing the nanoparticles 111 to self-assemble in a predefined pattern , Form a plurality of self-assembly 112 (S1400).

For a moment, referring to FIG. 2, the step of forming the plurality of self-assemblies 112 (S1400) is a process of maintaining the temperature of the glass substrate GS at 32°C or higher (S1410) and a contact angle of 15° to The process of applying a suspension to the glass substrate GS at intervals of 150 µm or more between the droplets to prevent interference between the droplets in a state formed at 17° C. among 60° (S1420), and to apply the suspension to the glass substrate GS 10 It is stored in an oven at 100°C for a minute to evaporate formamide sufficiently to form an amorphous self-assembly 112 having a coffee-ring structure (S1430). At this time, the temperature of the glass substrate GS is preferably maintained at 32° C. or higher and 50° C. or lower, but the temperature of 50° C. or higher also does not seem to cause a great deal to form the self-assembly 112.

Here, referring to FIG. 3, in one embodiment of the present invention, it is assumed and described that the silica car particles 111 in each of the self-assemblies 112 are formed in a coffee-ring structure, but the technical idea of the present invention It is not limited to this, and it is of course possible to form the silaca particles 111 in a flat (monolayer) structure or a dome (Dome) structure. However, in the dome structure, it is preferable to form the silica particle 111 in a monolayer of a flat structure and a coffee-ring structure because formation of a grating structure by a load applied to the grating composite 100 is more difficult than other structures. Do. This will be described in detail again with reference to FIGS. 8 to 11. Briefly, a method of generating a monolayer of a flat structure and a coffee-ring structure, the monolayer is droplet temperature for forming the self-assembly 112 rather than the temperature of the glass substrate GS in a state where the glass substrate GS is subjected to super hydrophilic treatment. Is created by setting it higher than the temperature of the glass substrate GS, and the coffee-ring structure can be formed by setting the temperature of the glass substrate GS higher than the temperature of the droplets in a state in which the glass substrate GS is hydrophilic. .

In addition, a piezoelectric drop-on-demand inkjet printer with a Dimatrix cartridge is prepared for the printing process of the silica nanoparticles 111, which has 16 independent diameters of about 21.5 μm and a spacing of 254 μm. It has a working nozzle, supports 10 pℓ of droplet, and can adjust the angle of the print head from 5 μm to 254 μm in 1 μm increments depending on the resolution setting (9 dpi), and a vacuum pump is installed. An A4 sized substrate table that can be heated to ℃ is provided.

Referring back to FIG. 1(d), when the self-assembly 112 having a coffee-ring structure is formed by evaporating formamide from the applied suspension, a mortar-type polymer polymer (Macromolecule Polymer) is placed on the self-assemblies 112. Pour, the polymer polymer is impregnated with a structure surrounding each of the self-assemblies 112 so as to accommodate all or part of each of the self-assemblies 112 to form a base substrate 113. (S1500) Here, the base substrate ( The process of forming 113) (S1500) includes a process of heating at 75° C. for 3 hours (S1510) to cure the mortar-type polymer polymer and a process of cooling the cured polymer polymer for 30 minutes (S1520). In this case, it is preferable that a polydimethylsiloane (PDMS) is used as the polymer polymer.

Next, by removing the glass substrate GS from the base substrate 113, the grating composite 100 exhibiting a structural color by excluding, diffracting, scattering, or reflecting incident light on the base substrate 113 is completed. (S1600) )

4, the refractive index difference between the self-assembly 112 and the base substrate 113 is within 0.04 (that is, the refractive index of the self-assembly 112 is 96% to 104% of the refractive index of the base substrate 113). By being formed of, when the micro or nano-particles 111 are cured on the PDMS matrix and encapsulated in the self-assembly 112, they may have the same or similar color of the base substrate 113 and remain hidden due to invisibility at all. have. In addition, when the base substrate 113 is made of a very transparent material, the self-assemblies 112 may also be maintained in a transparent state.

Hereinafter, the mechanical and optical properties of the variable grating composite 100 according to an embodiment of the present invention will be described in detail with reference to FIGS. 5 to 20.

Referring to Figure 5 (a), 6 and 7, nanoparticles 111 are distributed by forming a number of layers (Layer) along the height direction or thickness direction of the self-assembly 112 or the base substrate 113, the outside In the state where no stimulus is applied, the grating structure is not formed, so the structure color exists as a zero-dimensional grid that does not appear (Covert). As described above, most of the incident light is transmitted by the photonic glasses due to the same or similar refractive index (R/silica-R/PDMS = 0.04) of the base substrate 113 of the PDMS and the self-assemblies 112. It is because. Accordingly, the self-assembly 112 may be completely hidden in the base substrate 113 in a state in which the structure color due to the grating structure formed by the particles 111 does not appear.

5(b), 6, and 7, meanwhile, when the compressed deformation according to the bending load in the 1 ^st layer direction occurs in the grating composite 100, the nanoparticles 111 of each self-assembly 112 are By changing the relative position by bending load to form a corrugated grating structure, each is transformed into a one-dimensional grid in which a structural color appears (Overt), and a self-assembly 112 having a structural color due to such a corrugated grating structure 112 ) Gathered together to form a specific image. At this time, among the layers of the nanoparticles 111 included in each self-assembly 112, a layer in which a structure color is exhibited by a wrinkled grating structure is a 1 ^st layer nanoparticle 111 layer.

Referring to Figure 5 (c), 6 and 7, on the contrary, in the case of the compressed deformation caused by the bending load in the 7 ^st layer direction, that is, when the tensile deformation occurs, the nanoparticles 111 of each self-assembly 112 ), the relative position of which is changed by the bending load, but the spacing of the nanoparticles 111 is not approached, but is relatively distant or deformed or maintained as a 0-dimensional grid that does not form a corrugated grating structure. Accordingly, not only does the structural color do not appear (Covert) in each of the self-assemblies 112, and a specific image formed by gathering together the structural colors does not appear.

Here, the load applied to the grating composite 100 described above may be a single load of a compressive, tensile, or torsional load, including a bending load, or may be two or more composite loads, and the compressed formed on the grating composite 100 described above Deformation can be such a compressive, tensile, bending or torsional load.

Referring to Figures 8 to 11, looking at the principle of forming the grating structure of the wrinkle shape of the nanoparticles 111 of the 1 ^st layer according to the bending load, the self-assembly 112 of the present invention is a glass substrate (GS) It is distributed and formed to have a gradient for each layer by formation conditions formed by forming droplets. Specifically, referring to FIG. 3 for a while, the gradient of the nanoparticles 111 distributed in the self-assembly 112 is formed in a form having almost no distribution gradient, such as a monolayer of a flat structure, or a gradient such as a coffee-ring structure. Is formed but the inner center is formed in a recessed shape, or not shown, but may be formed in a shape having a semicircular distribution gradient like a dome structure.

At this time, unlike the dome structure, the mono-layer structure and the coffee-ring structure do not have a thick portion in the self-assembly 112 so that the PDMS enters between the nanoparticles 111 to form a complex structure with the nanoparticles 111. It is easy. In more detail, the monolayer structure is a thin film, and the PDMS is easy to enter between the nanoparticles 111, and the coffee-ring structure includes a large amount of empty space between the upper particles, so that the PDMS is a nanoparticle 111 ), while the dome structure is densely packed with the inner center, that is, the upper layer particles, it is difficult for the PDMS to enter between the nanoparticles 111.

Meanwhile, referring to FIG. 12, when a PDMS enters between the nanoparticles 111 in the self-assembly 112 to form a complex structure, when a bending load through the base substrate 113 is applied to the self-assembly 112, Due to the mismatch of mechanical properties of the thin and rigid film layer 113a and the thicker and more flexible substrate layer 113b than the film layer 113a, the film layer 113a periodically undergoes buckling-type instability due to instability. A wrinkle arrangement pattern having a width is formed. However, the periodic pleated structure appears in the above-mentioned monolayer structure and the coffee-ring structure self-assembly 112, but in the dome structure self-assembly 112, the dome structure self-assembly 112 is very high in its entirety. It is formed in the form of a large block having an elastic modulus, so that the wrinkles are formed larger than the dome pattern, so that the wrinkle pattern cannot be observed in the microscale unit. That is, in the dome structure, a wrinkle structure does not appear on the self-assembly 112.

In addition, the coffee-ring structure of the nanoparticles 111 formed in the self-assembly 112 is as described above, when the elastic gradient according to the layer of the nanoparticles 111 is formed, when a single load or a composite load is applied, flat It has the advantage of forming a regular wrinkle pattern rather than the monolayer of the structure. This is, when various mechanical loads are applied to the self-assembly 112, the structure of the nanoparticles 111 of the flat structure may be irregularly changed according to the internal stress, but the coffee-ring structure of the nanoparticles 111 The structure may be more regular due to the elastic gradient, so it appears to be as advantageous in forming a wrinkle pattern.

Here, the periodicity λ of the wrinkle arrangement is determined by the thickness (h) of the film, the elastic modulus (E _f ) of the film layer 113a, and the elastic modulus (Es) of the substrate layer 113b, which can be predicted through linear buckling theory. It is determined as follows.

는 평면 변형 계수이며

로 정의된다.

는 포아송 비율이다. 이러한 수학식 1은 표면 주기 현상의 모델을 보여주며 그레이팅 복합체(100)의 주기성을 예측하게 한다. 세부적으로, 본 발명의 필름층(113a)과 기판층(113b)이 복합된 그레이팅 복합체(100, SiO₂-NPs/PDMS)는 기판층(132, E_s = 0.75 MPa)의 강성에 비해 필름층(131, Ef = 수십 GPa)의 강성이 매우 높기 때문에 필름층(113a)을 강성 필름층(113a)으로 간주할 수 있으며, 커피-링 나노 구조를 둘러싼 PDMS는 도 12의 분홍색 화살표와 같이 압축력을 제공한다. 여기서, 베이스 기재(113)의 탄성계수보다 자기조립체(112)의 탄성계수가 높게 설정되어 필름층(113a)의 강성이 기판층(113b)의 강성에 비해 높게 형성된다.here,

Is the plane strain factor

Is defined as

Is the Poisson rate. Equation 1 shows a model of the surface periodic phenomenon and predicts the periodicity of the grating composite 100. In detail, the grating composite (100, SiO ₂ -NPs/PDMS) in which the film layer 113a and the substrate layer 113b of the present invention are combined is compared to the rigidity of the substrate layer 132, E _s =0.75 MPa. Since the stiffness of (131, Ef = tens of GPa) is very high, the film layer 113a can be regarded as a rigid film layer 113a, and the PDMS surrounding the coffee-ring nanostructure exhibits compressive force as shown in the pink arrow in FIG. to provide. Here, the elastic modulus of the self-assembly 112 is set higher than the elastic modulus of the base substrate 113 so that the rigidity of the film layer 113a is higher than that of the substrate layer 113b.

12 and 13, the grating composite 100 according to an exemplary embodiment of the present invention is formed closer to a transmission grating structure than a diffraction grating structure, from the rear surface of the grating composite 100 When white light is incident, the incident light passes through the grating composite 100 and the incident light is diffracted or scattered by a corrugated grating structure, whereby the structural colors of the self-assemblies 112 appear to form a specific image. In this case, it is needless to say that the resulting structural color may appear in different colors depending on the incident angle of the incident light and the viewing angle of the observer. Here, the observer may be a human vision, but may be an image observation device such as a CCD camera.

Referring to FIG. 14, it can be confirmed that the wrinkle structure appearing in the grating composite 100 appears only when compressed deformation occurs as described above.

으로 설명될 수 있으며, 여기서 정수 n은 회절 차수이다.

는 400 nm 내지 700nm 범위의 백색광의 파장으로 가시광선 스펙트럼 영역을 커버한다.

및

는 각각 관찰 각도 및 입사각이며 주름의 주기성을 파악하기 위해 그 값은 고정된다. d는 주름의 주기이다. 따라서 주름의 주기(d)가 입자 크기에 따라 증가함에 따라 적색 편이가 일어날 것을 보인다.Referring to Figure 15, it can be seen the structural color platform of the grating composite 100. First, if the sizes of the nanoparticles 111 are different, as shown in FIG. 15(a, b, c), when the size of the nanoparticles 111 is 300 nm, the period of wrinkles is about 2.44 μm, and 700 nm days. It can be seen that the time is 6.50 μm. Therefore, the increase in the periodicity of the wrinkles with the increase in the particle size can be explained by the increase in the thickness (h) of the thin film layer 113a with the increase in the particle size. At the same time, it can be seen that there is an apparent red shift when the particle size of the nanoparticles 111 is increased from 300 nm to 700 nm. This is the diffraction equation

It can be described as, where the integer n is the diffraction order.

Covers the visible spectrum region with a wavelength of white light ranging from 400 nm to 700 nm.

And

Is an observation angle and an incidence angle, respectively, and the values are fixed to determine the periodicity of the wrinkles. d is the cycle of wrinkles. Therefore, it appears that the red shift occurs as the period (d) of wrinkles increases with the particle size.

15 (d, e, f, g), when the grating composite 100 is bent inward, it is possible to obtain linear diffraction spots having different distances. However, diffraction spots are not visible when the structural color platform is bent or not bent in the opposite direction. Through this, it can be seen that the grating effect is mainly caused by the hierarchical complex wrinkle of the grating composite 100 rather than the particles of the nanoparticle 111.

In addition, the distance of wrinkles can be calculated by the following equation.

Where λ _laser is the laser wavelength, d is the wrinkle spacing, L is the distance from the screen to the platform of the structural color, and D is the distance between diffraction spots of the same diffraction purity. Corresponding to the distance of the diffraction spots obtained from the structural color platform prepared by the nanoparticles 111 having different sizes (300 nm, 500 nm, and 700 nm), the calculated values of the wrinkle periodicity are 2.99 μm and 4.92 μm, respectively. , 6.50 μm. Through this result, it can be confirmed that the grating effect is mainly due to the complex wrinkles of the grating composite 100. 15(i), it can be seen that after bending of the grating composite 100, a certain peak in the visible range appears in the transmission spectrum due to the grating effect due to the wrinkle effect. Then, the grating composite 100 is moved along the x-axis and y-axis to measure a series of spectra. Referring to (j) of FIG. 15, it can be seen that the spectrum is almost constant when moving along the x-axis, because if the y-coordinates are the same, the angle of the incident light is the same. At the same time, the shape change of the bending moment and the shape of the wrinkle along the x-axis are the same. On the other hand, as it moves along the y-axis, the angle of incident light to the wrinkles continues to change. Therefore, the shift of spectrum is obvious.

16 and 17, in addition, the grating composite 100 of the present invention uses the structure of the nanoparticles 111 in the self-assembly 112 to perform grating of the one-dimensional (1D) structure in the x-axis or y-axis direction. In addition to being formed, it is also possible to form grating of a two-dimensional (2D) structure in the x and y-axis directions. The coffee-ring structure is a structure in which the top, bottom, left, and right are symmetrical, so that a grating structure is formed by a complex load as well as a simple load, and thus a structure color and an image formed by the structure color can be displayed. Specifically, referring to FIG. 17(a), the grating formed in the grating composite 100 is formed in a one-dimensional structure, and a structural color appears in the bending load in the y-axis direction to form an image, but in the x-axis direction rotated 90° The structural color of the bending load may be prevented from appearing. Referring to FIG. 17(b), when the grating structure is formed by grating of a two-dimensional structure, when the loads in the x and y-axis directions act in combination, the complex It is possible to make the structure color by bending load appear.

Referring to FIG. 18, when the composite isotropic compressive loads in the x and y axes forming a 90° angle are applied to the left figure, the microparticles of the nanoparticles 111 in the self-assembly 112 are microscopically irregular but macroscopically ruled. A grating structure with a pleated shape is shown, and the figure on the right shows the center of the coffee-ring structure of the self-assembly 112 when a combined isotropic compressive load acting along a 45° angle or a 360° radius is applied. It is formed in a radial shape and has a regular wrinkle structure.

19 and 20, meanwhile, the grating composite 100 of the present invention is a plasma bonding (cohesion bonding, Plasma bonding) of two different grating structures 110 and 120 that can form different specific images symmetrically By combining the base substrates to face each other, it is possible to form a specific image in which each grating structure 110 and 120 is set by different loads applied in different directions. Specifically, two grating structures 110 and 120 in which an image (pattern-A, first image) by the first structure 110 and an image (pattern-B, second image) by the second structure 120 are formed are formed. When two substrate layers 113a and 113b are bonded so that the substrate layers face each other so that they face outwards, when one side is compressed by an external stimulus and the other side is stretched, the structure of the first structure 110 occurs When the color is expressed and the first image of the pattern-A appears, on the contrary, when one side is stretched and the other side is deformed, the structure color of the second structure 120 having a different shape and color from pattern-A is expressed. It is possible to cause the second image of the pattern-B to appear.

In other words, when the above-described compression deformation, a pattern appears on one surface and the pattern on the other surface is hidden, and when tensile deformation, a pattern appears on the other surface and the pattern on the other surface is hidden, and various natural colors and colors are generated according to different bending loads caused by external stimuli. You can make the image appear. This shows the possibility of embedding more various patterns in one device depending on the number of layers of the grating structure being manufactured.

Hereinafter, the effect achieved by the grating composite 100 of the present invention will be outlined.

The grating composite 100 of the present invention not only utilizes input-responsive or hidden-visible characteristics, but also has technical features of the grating structure capable of one-dimensional or two-dimensional conversion, and has been used as an anti-counterfeiting means. It is expected to realize a higher level of anti-counterfeiting devices and systems by further increasing the utilization of the grating structure.

In addition, the method of manufacturing a grating structure exhibiting a general structural color includes a natural sedimentation and wettability that allows the crystal to be precipitated by gravity by allowing the colloidal suspension to stand still. After the substrate is immersed vertically in a colloidal suspension solution, a crystal is formed on one substrate by using a convective assembly in which crystals are formed on the substrate as the solvent of the colloidal suspension evaporates, and an external electric field. Electrophoretic deposition and the like are known. However, the method of forming photonic crystals other than the electrophoresis method takes about 1 to 2 days to form crystals of several cm ^{2 in} size, and the electrophoresis method has the advantage of being able to form a three-dimensional colloidal crystal within a fast process time. There is a disadvantage in that the completeness of the colloidal crystals formed instead of slightly decreases.

On the other hand, the variable grating composite 100 of the present invention can easily manufacture the grating composite 100 by printing micro or nano particles 111 in droplet form by using the inkjet technology of the inkjet printer on the glass substrate GS. Of course, it is easy to form a corrugated grating structure by deforming micro or nanoparticles 111 by a load by hydrophilizing the glass substrate GS and controlling the temperature and contact angle of the substrate and the droplet, respectively. It can be formed into a monolayer of a flat structure or a coffee-ring structure.

Hereinafter, a system and method for providing information using the variable grating composite 100 described above will be described. However, duplicate description will be omitted.

21 to 25, the above-described grating composite 100 is produced by the producer of the object in the form of a film, and the user of the object receives information related to the object from the producer, as well as whether the object is authenticated according to the acquisition or It can serve as a means to determine whether or not it is forged.

To this end, the information providing system of the present invention includes a producer module 1000, an information providing DB 2000, and a user module 3000.

Producer module 1000, as described above, by mixing the nanoparticles 111 and the solvent to form a self-assembly 112, the mixed nanoparticles 111 and the solvent to the hydrophilic surface of the object by inkjet method Through the self-control assembly method, the grating composite 100 having a single-layer or coffee-ring-shaped nanostructure is manufactured in a film form.

The information providing DB 2000 includes the color information of the structure color, which varies depending on the intensity of the light incident on the pleated grating structure when the structure color appears from the producer module 1000, the angle at that time, and the viewing angle of the user. Specification information including color pattern information is received and provided to the user module 3000. At this time, the above-described specification information is provided by the producer module 1000, the predetermined bending degree, illuminance angle, viewing angle, etc. of the base substrate 113 are provided, so that color information of structural colors that can be confirmed through the user module 3000 is displayed. Or, it may be a patterned image form represented by a collection of structural colors or a special image pattern incorporating information such as a barcode or a QR code.

In addition, the information providing DB 2000 is used not only as a storage space for providing specification information from the producer module 1000 to the user module 3000, but also whether the object is authenticated or counterfeit from the user module 3000. It can provide information for judging or serve as an information provision platform.

For reference, the information provision DB 2000 generally means a base station server or a repeater device included in one or more communication networks operated by a plurality of mobile communication companies, and the producer module 1000 and the user module ( 3000) to transmit and receive information.

The user module 3000 recognizes color information or color pattern information of a structure color represented by a wrinkled grating structure, generates detection information corresponding to the specification information, and provides it to the user, as well as determining whether or not the object is counterfeit. By providing input information that provides DB (2000) as an information providing platform, and calculating color information of structural color or pattern information of color to provide related calculation information, to realize a redundant security system can do.

Here, the user module 3000 refers to a terminal that can access the information providing DB 2000 through a local area network (LAN), a wide area network (WAN), and a desktop PC and a smart phone. Phone), a laptop computer (Laptop Computer), a tablet device (Tablet Device), and the like may be included. In addition, the information providing DB 2000 may include a web server, a website, or a cloud system capable of easily accessing and viewing or modifying stored data through the Internet.

Referring to FIG. 24, in detail, the user module 3000 includes a structural color detection unit 3100, a data matching unit 3200, a counterfeit detection unit 3300, a basic information exchange unit 3400, and calculation information providing unit ( 3500).

Structural color detection unit 3100 recognizes the color information of the structural color and the color pattern information appearing through the grating structure, the degree of bending of the base substrate 113 according to the relative position of the self-assemblies 112, is incident on the grating structure Sensing information including light intensity, light angle, and viewing angle information of the user looking at the grating structure is generated and provided to the user. At this time, the provided data may be converted into identification information such as numbers, letters, or symbols, and stored in a data storage unit (not shown).

Here, the structural colors appearing through the grating structure may be a single color having a similar tone or a set of colors containing a gradation, or may be letters, numbers, symbols, or images embedded with a specific message.

When the data matching unit 3200 transmits the bending degree, light intensity, light angle, and user's viewing angle information transmitted from the producer module 1000 to the information providing DB 2000, and is stored as specification information of the grating structure, Among the data recognized by the structure color detector 3100, color information of the structure color of the detection information corresponding to the usage information and pattern information of the color are derived and provided to the user. This allows the producer to provide the user with information related to the object.

At this time, it is preferable that the grating composite 100 includes guide information capable of mutually connecting and connecting the user module 3000 and the information providing DB 2000.

The forgery or false discrimination unit 3300 compares the specification information of the structure color previously stored in the information providing DB 2000 by the data matching unit 3200 and the detection information generated by the structure color detection unit 3100. It is possible to determine whether the authentication or counterfeit of the object.

The basic information exchange unit 3400 parameterizes the detection information generated by the structural color detection unit 3100 and inputs it to the information providing DB 2000, and provides another usage information corresponding to the detection information as an output parameter. Receive. This means that the information provision DB 2000 can be used as a role of the information provision platform.

The calculation information providing unit 3500 may display color contrast information for each position of the structure color calculated based on the color index of the structure color displayed through the grating structure and wavelength information of the color indicated by the structure color. By converting it to identification information including symbols and transmitting it to the information providing DB 2000, it acts as a keyword to access the final information in the form of output parameters compared to the input parameters performed by the basic information exchange unit 3400 described above. Can.

This provides a basis for the producer and the user to exchange the linked information with each other to check the matched information, thereby authenticating the information on the object multiple times or determining whether or not it has been forged.

In more detail, the grating structure of the present invention has a significantly higher modulus of elasticity than the base substrate 113 supporting its shape. This, the shape of the grating structure can be largely changed even with a small deformation of the base substrate 113 by external force, so that the grating structure is sensitive to external stimuli, and thus, can express various structural colors according to the degree of bending. In addition, the structure color may look different depending on the intensity of light, the angle of incidence of light, and the viewing angle of the user. Therefore, the resulting structural color is expressed by variables such as the degree of bending due to the isotropic load, the intensity and angle of light, the viewing angle, the color index, etc., for each position of the particle 111. It is expected that the grating composite 100 can properly function as an information providing means including various information.

In addition, the grating composite 100 of the present invention has a very similar refractive index to the grating structure and the base substrate 113, so the structure color of the grating structure is in a hidden state (Covert) without external stimulation, thereby ensuring initial security. can do.

In addition, it is possible to determine whether the primary authentication or forgery is performed by comparing the detection information and the specification information through the structure color detecting unit 3100 and the forgery discrimination unit 3300, and further, the above-described calculation information providing unit 3500 ) Calculates color contrast information according to the degree of bending calculated based on the structure color represented by the grating structure and wavelength information of the color represented by the structure color, converts it into identification information including numbers, letters, or symbols, and By transmitting to the information providing DB 2000, the user can view or receive the information of the producers matched with it, so that it is possible to discriminate whether the information is secondary forged.

Referring to Fig. 25, a method for providing information using the above-described information providing system will be described.

First, as described above, the user manufactures the grating composite 100 through the user module 3000 in which the color of the structure according to the grating structure appears in a state in which its shape is changed by compression, tension, bending, or torsional load.( S2100) At this time, the structure color set by the grating structure may be a single color or a similar color with a gradient, and may be a combined pattern of letters, numbers, images, or bar-code or QR-code.

Here, in the process of manufacturing the grating composite 100, the nano-particles 111 are prepared, the glass substrate GS is prepared, and the self-assembly 112 is printed on the glass substrate GS to form a base substrate 113 It includes the process of being supported and coupled by, but the detailed description is omitted because it is as described above.

The object is provided to the user together with the grating composite 100 manufactured by the producer module 1000 (S2200), and the user module 3000 is compressed in the grating composite 100 to provide the user with the information of the object, By adding tension, bending or torsional loads, color information of the structural color or pattern information of the color appearing at that time is collected to generate sensing information. (S2300) These color information or color pattern information is collected through the user's naked eye. It may be recognized, but may be recognized and collected through the structure color detecting unit 3100 in the user module 3000.

At this time, the grating composite 100 is formed with a variety of grating structures on one base substrate 113, so that a plurality of color information or color pattern information can be provided to the user. In addition, the resulting structural color can express various structural colors by reacting very sensitively to external stimuli applied to the base substrate 113 by a grating structure that includes a significantly higher elastic modulus than the base substrate 113. Accordingly, the grating composite 100 enables a role as an information providing means including more information.

In addition, in order to prevent the authentication or forgery of the object, information capable of determining the authenticity of the object is registered through the user module 3000 as specification information in the information providing DB 2000. (S2400)

The user module 3000 determines whether the object is authenticated or counterfeit by comparing the structure color appearing in the grating composite 100 with the specification information registered in the information providing DB 2000. (S2500)

Here, the step of determining whether the counterfeit is, the process of detecting and collecting the color information of the structural color and the pattern information of the color appearing on the grating composite 100 through the structural color detecting unit 3100 (S2510), and a data matching unit Matching detection information collected through (3200) and specification information pre-stored in the information providing DB 2000 based on the bending degree of the base substrate 113, light intensity, light angle, and viewing angle of the user, respectively It includes a process (S2520) and a process of determining whether the matched detection information and specification information are identical (S2530).

In addition, the information providing DB 2000 may not only serve to store the set reference data for preventing forgery, but may also serve as an information providing platform.

The user module 3000 includes the color information of the structural color and the pattern information of the color through the basic information exchange unit 3400, such as the bending degree of the grating composite 100, the light intensity, the light angle, and the user's viewing angle. By converting the sensed information into identification information including numbers, letters, and symbols, and parameterizing and inputting it into the information provision DB 2000, the user can view information of producers previously stored in the information provision DB 2000. (S2600) Variables in the process in which the structure color is displayed by the grating structure at this time are instrumented as input parameters, and can perform the function of one authentication means.

Furthermore, the information providing DB 2000 does not simply store the primary reference data for determining whether to authenticate or falsify between the producer module 1000 and the user module 3000. The reference data for performing the third authentication or forgery determination process can be stored, and the forgery determination process is interactive between the producer module 1000 and the user module 3000 through the information provision DB 2000. It can be achieved through interaction.

Specifically, the grating composite 100 manufactured by the producer module 1000 is provided, and specifications such as the degree of bending, the intensity of the light, the angle of the light, or the viewing angle of the user, in which the structural color appears in the information providing DB 2000 After the information is registered, the user module 3000 determines whether it is counterfeit by matching the detection information of the structural color detection unit 3100 with the specification information previously stored in the information providing DB 2000.

When it is determined whether the primary forgery is performed, the user module 3000 converts color contrast information and wavelength information according to the bending degree calculated based on the color index into identification information including numbers, letters, and symbols, and then converts the information. It transmits to the provision DB 2000 and judges once again whether to match and falsify the information previously stored in the provision DB 2000 (S2700).

In other words, the structural color in the firstly hidden state is revealed according to the degree of bending, so it is determined whether it is counterfeit based on the specification information stored in the information providing DB 2000, and secondly, the processed data calculated through the structural color is again It is possible to implement a double anti-counterfeiting system through the information provision DB 2000 by determining whether the object is authentic or not based on another specification information transmitted and stored in the information provision DB 2000. .

Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

100: grating complex
110: first structure
111: particle 112: self-assembly
113: base substrate 113a: film layer
113b: substrate layer
120: second structure
GS: Glass substrate
1000: producer module
2000: Information provision DB
3000: User module
3100: structural color detection unit 3200: data matching unit
3300: counterfeit or not discrimination unit 3400: basic information exchange unit
3500: calculation information provider

Claims (20)

In order to provide information of an object through color, a plurality of micro or nano particles are formed into a plurality of magnetic assemblies by self-assembly and impregnated with a structure surrounding a flexible base substrate, and the base is applied by a load applied from the outside. When the shape of the substrate is changed, the relative positions between the self-assemblies accommodated in the base substrate and the self-assemblies are respectively included, so that the relative positions of the particles are changed, so that the particles have the same or different arrangements of wrinkles. Producer module for providing a grating composite to form a specific pattern by forming the grating structure, the same or different structural colors respectively appear on the grating structure by the incident light; And
An information providing system using a variable grating complex comprising a user module that detects color information of the structural color and pattern information of a color, respectively, or provides the information of the object to a user. The method according to claim 1,
The structure colors by the grating structure and the specific patterns formed by the structure colors include the intensity of light incident on the grating structure according to the degree of bending of the base substrate, the angle of light incident on the grating structure, and the grating structure. Information providing system using a variable grating complex that appears in a pattern of different colors according to the viewing angle of the user looking at. The method according to claim 1,
An information providing system using a variable grating composite in which the relative positions of the particles are changed by applying an anisotropic load in a one-dimensional shape or an isotropic composite load in a two-dimensional shape. The method according to claim 2 or 3,
An information providing system using a variable grating composite in which the elastic modulus of the particles is formed larger than the elastic modulus (Young's Modulus) of the structure. The method according to claim 1,
The structure color pattern information includes text, image, bar-code, and QR-code, and includes a plurality of color pattern information matched to each of the relative positions of the particles. Information providing system using a variable grating complex comprising. The method according to claim 1,
When the structural color appears from the producer module, the specification information including the color information of the structural color and the pattern information of the color, which is changed according to the intensity of light incident on the grating structure, the angle of the light, and the viewing angle of the user is received. An information providing system using a variable grating complex further comprising an information providing DB provided to the user module. The method according to claim 6,
The user module,
A structure color sensing unit that senses the structure colors indicated by the grating structure and generates detection information including color information for each position of the self-assembly where the structure color appears and color pattern information; And
An information providing system using a variable grating complex including a forgery discrimination unit that compares the detection information with the specification information to determine whether the object is authenticated or whether the object is forged. The method according to claim 7,
The user module,
By converting color contrast information and wavelength information for each location calculated based on a color index from the color information into identification information including numbers, letters, and symbols, and comparing it with identification information previously stored in the information providing DB An information providing system using a variable grating complex including a calculation information providing unit for determining whether the object is authenticated or forged again. The method according to claim 6,
The user module,
A structure color sensing unit that senses the structure colors indicated by the grating structure and generates detection information including color information for each position of the self-assembly where the structure color appears and color pattern information; And
An information providing system using a variable grating complex including a basic information exchange unit receiving producer information matching detection information as an output parameter by providing the detection information as an input parameter to the information providing DB. The method according to claim 6,
An information providing system using a variable grating complex that provides color information of the structural color and pattern information of the color represented by the grating structure to provide guide information for connecting the user module and the information providing DB. In order to provide the information of the object through color, the producer module is impregnated with a structure in which a plurality of micro or nano particles are formed of a plurality of magnetic assemblies by self-assembly and wrapped around a flexible base substrate. When the shape of the base substrate is changed by the relative positions between the magnetic assemblies accommodated in the base substrate and the magnetic assemblies, the relative positions of the particles are changed, so that the particles have the same or different arrangement. Providing a grating composite that forms a specific pattern by forming a corrugated grating structure, whereby the same or different structural colors appear on the grating structure by incident light; And
A method for providing information using a variable grating complex comprising a user module, comprising: a user module detecting the color information of the structural color and the pattern information of the color respectively or providing the information of the object to the user. The method according to claim 11,
The structural colors and the patterns formed by the structural colors by the grating structure indicate the intensity of light incident on the grating structure, the angle of light incident on the grating structure, and the grating structure according to the degree of bending of the base substrate. A method of providing information using a variable grating complex that appears in different colors depending on the viewing angle of the user looking at it. The method according to claim 11,
A method of providing information using a variable grating composite in which the relative positions of the particles are changed by applying a one-dimensional anisotropic load or a two-dimensional isotropic composite load. The method according to claim 12 or 13,
A method of providing information using a variable grating composite having a larger elastic modulus of the particle than a Young`s Modulus of the structure. The method according to claim 11,
The structure color pattern information includes a text, an image, a bar-code, a QR-code, and a method of providing information using a variable grating complex including a plurality of color pattern information matched to each of the changed relative positions of the particles. The method according to claim 11,
After the step of providing the grating complex,
Color information and color of the structure color depending on the relative position information of the self-assembly when the structure color appears from the producer module from the producer module, the intensity of the incident light of the grating structure, the angle of light and the viewing angle of the user Method of providing information using a variable grating composite further comprising the step of receiving the specification information including the pattern information of the provided to the user module. The method according to claim 16,
The step of providing the user module with information on the object,
A structural color sensing unit detecting structural colors reflected from the grating structure, and generating sensing information including color information for each location of the self-assembly where the structural color appears and color pattern information; And
A method for providing information using a variable grating composite, comprising the step of determining whether the object is authenticated or whether the object is counterfeit by comparing the detection information and the specification information by a forgery discrimination unit. The method according to claim 17,
The step of providing the user module with information on the object,
The calculation information provider converts color contrast information and wavelength information for each location calculated based on the color index from the color information into identification information including numbers, letters, and symbols, and identifies the information stored in the information provision DB. A method for providing information using a variable grating complex, comprising the steps of re-determining whether the object is authenticated or counterfeit by comparing with information. The method according to claim 16,
The step of providing the user module with information on the object,
A structural color sensing unit detecting structural colors reflected from the grating structure, and generating sensing information including color information for each location of the self-assembly where the structural color appears and color pattern information; And
A method for providing information using a variable grating complex comprising the step of receiving information of a producer matching the detection information as an output parameter by providing the detection information as an input parameter to the information providing DB by the basic information exchange unit. The method according to claim 16,
After the step of providing the grating complex,
A method of providing information using a variable grating complex, further comprising: providing color information of the structure color and pattern information of the color represented by the grating structure by providing guide information for connecting the user module and the information providing DB.

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