TW202206371A - Card with micro-nano structures and usage method thereof - Google Patents

Abstract

The present invention provides a card with micro-nano structures, which comprises a card body made of a plurality of transparent or translucent plastic films. One side of the plastic film comprises a structural surface, and the other side of the plastic film is a non-structural surface. The structural surface is provided with a micro-nano grating structure formed by hot pressing process or UV transfer process, and the micro-nano grating structure comprises distinguishing information, and the content of each card comprises different distinguishing information. A plurality of game cards can also compose a single card set according to the logically relationship between the distinguishing features, thereby increasing the interest of the card, and improving the privacy of the card by various means. The present invention also provides a method for using the above-mentioned micro-nano structure card.

Description

Micro-nano structure card and method of using the same

The present invention relates to the technical field of cards, in particular to a card card with a micro-nano structure and a method of using the same.

In the prior art, it is a mature technology to form a card on a transparent film by making a micro-nano structure. The micro-nano structure on the card can clearly see the pattern formed by the micro-nano structure under the irradiation light. When exposed to light, the surface with the micro-nano structure on the card is in a matte visual state, and the part without the micro-nano structure appears transparent. Cards with this kind of micro-nano structure are generally used as single components in the prior art.

In the prior art, researches in this technical field mostly focus on the imaging effect of micro-nano structures on the card under irradiated light, but little attention is paid to the visual chromatic aberration of the card observed with the naked eye under non-irradiated conditions.

The game cards in the prior art, such as playing cards or board game cards, are all printed with patterns on the card surface of the paper, in a single form. In order to increase the fun of the game, many aspects have been explored. However, it has not been thought of using micronano The structure designs the pattern on the card on the transparent plastic film.

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a card with a micro-nano structure, so as to increase the interestingness of the game card or the set of cards made by the card.

Further, the purpose of the present invention is to provide a micro-nano structure card with all-round privacy protection feature.

Another object of the present invention is to provide a method of using the above-mentioned micro-nano structure card.

The first technical scheme adopted by the present invention to solve its technical problem is: A micro-nano structured card, which comprises a card body made of a plurality of transparent or translucent plastic films, one side surface of the plastic film is a structural surface, and the back is a non-structural surface. The surface is provided with a grating micro-nano structure formed by thermocompression or UV transfer printing, and the grating micro-nano structure is loaded with distinguishing information. The distinguishing information has different contents on each card and constitutes a set of game cards.

The second technical scheme adopted by the present invention to solve the technical problem is: A micro-nano structured card, which comprises a card body made of a plurality of transparent or translucent plastic films, one side surface of the plastic film is a structural surface, and the back is a non-structural surface. There is a micro-nano structure on the surface, and the micro-nano structure carries distinguishing information. The micro-nano structure card includes several cards, and the micro-nano structure on the structural surface of each card carries the The distinguishing features are different, but the patterns formed by the distinguishing features on each card are logically related in content, so that all cards form a set of cards.

In the above two technical solutions, further, there are the following preferred measures: Each card in a deck of cards with different distinguishing characteristics of micro-nanostructures is indistinguishable from the naked eye under ordinary light; and/or, under ordinary light Under the naked eye, the 360-degree full-angle anti-peep, that is, the matte micro-nano structure displayed on all cards in the next deck of cards at any angle is visually the same.

The common light is light that is not illuminated, such as natural light or illumination light.

The micro-nano structures are diffractive optical elements (Diffractive Optical Elements, DOE for short) or holographic diffractive optical elements (Holographic Diffractive Optical Elements, HDOE for short).

The plastic film is made of colored or colorless transparent material.

The micro-nano structures on the structural surface can be either micro-structures or nano-structures.

2毫米以內，該單元在卡牌的結構面上重複排列。The unit size of the micro-nano structures on the structural surface is 2 mm

Within 2 mm, the unit is repeated on the structural surface of the card.

(0.5〜2)毫米以內。Further, the unit size of the micro-nano structure on the structural surface is (0.5~2) mm

(0.5~2) mm.

The microstructures on the card are arranged repeatedly on the card, so that when a point light source is used in use, as long as the card is irradiated, the distinguishing feature on the card, that is, the specific pattern in it can be presented.

The card set may constitute a deck of game cards, for example, a deck of playing cards, or a deck of board game cards, such as a deck of Three Kingdoms Kill board game cards, or other game cards. In addition, the card set may also be a set of related cards, such as a set of 108 cards depicting a picture of one hundred and eight generals in the Water Margin with a micro-nano structure, or 12 pictures depicting the twelve hairpins of Jinling, Dream of Red Mansions, etc. In the sales, it can be sold in sets, such as playing cards, etc., or it can be sold separately. For example, in a commercial promotion, a set of cards of Jinling Twelve Hairpins is sold in batches.

Preferably, a micro-nano structure formed by thermocompression or UV transfer printing or nano-imprinting is provided on the structure surface. The pattern of the micro-nano structure is determined according to the pattern design, and can be symmetrical, for example, a symmetrical pattern such as playing cards, and the micro-nano structure is either symmetrical or asymmetrical.

Preferably, the micro-nano structures on the structural surface are 3D micro/nano structures.

Using micro-nano structure (DOE) to make playing cards, if you follow the practice of conventional cards, that is, the distinguishing features carried by the micro-nano structure on each card are different, although the micro-structure (DOE) has certain characteristics. Anti-peep performance, but when viewed with the naked eye under normal light without illumination, the pattern of the card is different, and it will show different visual fog color difference. Because of the visual fog color difference of this card, players will The big and small cards are guessed through the difference in the color difference of the cards, which will affect the fairness of the game, thus making the cards provided by the present invention inconvenient to use as game cards.

Therefore, each card with different distinguishing characteristics can be seen with the naked eye under ordinary light, and the 360-degree full-angle privacy protection, that is, the complexity of the pattern on the card is different, but the matte surface (sub-surface) on it is not different. The best characteristics of a game card.

In order to realize the 360° all-round privacy protection of the cards provided by the present invention, the etching depth of the micro-nano structures on each card, the order of photolithography times, and the coating to change the visual chromatic aberration of the microstructures, etc. can be adjusted. Preferably, the adjustment means may be: Method 1: Adjust the etching depth of the lithography of the micro-nano structure.

In a deck of cards, the micro-nanostructures on each card are etched to different depths.

The etching depth of the micro-nano structure varies according to the complexity of the pattern of each card. The etching depth of the micro-nano structure is deeper on the card with a simpler pattern, and the micro-nano structure on the card with a more complex pattern is deeper. The etch depth of the structure is shallow.

The etching depth on the card is between 0.1 and 3 microns.

Method 2: Adjust the etching order of micro-nano structure lithography.

There are two measures: Measure 1: The order of the micro-nano structures on each card in a set of cards is the same, for example, it can be the second order, or the fourth order, or the eighth order, . . . When the order of the micro-nano structure of each card is the same, the etching depth of the order formed by the subsequent photolithography, such as the second and third photolithography, decreases.

Measure 2: The order of micro-nano structures on each card in a deck is not the same.

The etching order of the micro-nano structures on the structural surface on each card varies according to the complexity of the card pattern.

Specifically, the order of the more complex pattern is reduced, and the order of the simpler pattern is increased.

The micro-nano structures on the structural surface can be photolithography between 1 and 5 times to form second-order, fourth-order, eighth-order, sixteenth-order or thirty-two order micro-nano structures. Preferably 1 to 3 times of photolithography are used to form second-order, fourth-order and eighth-order micro-nano structures.

Through the above adjustment, it is possible to make this card unable to see the difference in the haze generated by the micro-nano structure on the structure surface except under the irradiated light.

Method 3: Adjust the color of the plastic film, that is, the plastic film is made of a colored transparent material.

By making the card with colored transparent plastic film, the light transmittance of the colored transparent material can be reduced, and the visual chromatic aberration can also be reduced, so that the difference in the fog surface caused by the complexity of the pattern on the card can be improved.

Method 4: A coating layer is provided on the plastic film.

That is, a coating layer is arranged on the plastic film to change the visual color difference of the card. The coating layer is preferably a colored and transparent coating.

Preferably, the coating film is provided, and the light transmittance parameter of the coating film layer is 20 to 90%, so as to adjust the visual color difference of each card.

Preferably, the coating material is aluminum, or silver, or gold, or platinum, or nickel, or the like.

The coating layer can be arranged on the structural surface of the plastic film, or can be arranged on the non-structural surface, but is preferably arranged on the structural surface.

The above several adjustment means can be used alone or in combination of two or more means.

On the basis of the above-mentioned technical scheme, there can also be the following preferred embodiments: In another preferred embodiment, the non-structured surface of the plastic film is provided with a first printing pattern.

In another preferred embodiment, a portion of the non-structured surface of the plastic film is provided with a first printing pattern.

In another preferred embodiment, a portion of the structural surface of the plastic film is provided with a second printing pattern.

In another preferred embodiment, the content of the second printing pattern is consistent with the content of the difference information.

The third technical solution adopted by the present invention to solve its technical problems is the use method of the cards in the aforementioned various solutions: A method of using a micro-nano structure card, comprising any of the above-mentioned micro-nano structure cards; looking at a light source through a plastic film to read the distinguishing information; or, the light source illuminates the plastic film to present out the difference information.

The beneficial effects of the present invention are: 1. The present invention innovatively proposes to use the micro-nano structure on the plastic film to form a plurality of cards with associated or coherent patterns on the content, and use the plastic film with the micro-nano structure to make the card, Distinguishing information is set on the micro-nano structure, and the content on it can be seen through the illumination of the light source, which adds a new form of game cards or sets of cards, enriches the form of the cards, and also increases the quality of such optical products. fun.

2. The present invention adjusts the micro-nano structures on the cards with different pattern complexity in the complete set of cards, or uses colored transparent plastic films to make the card body, or makes a coating layer on the card body, Or a combination of several means can make the difference between the cards in the ordinary viewing angle invisible and indistinguishable, and the difference information can only be read through a light source, so that the card provided by the present invention becomes a 360° full-angle anti-peep card. Card.

3. For the cards provided by the present invention, patterns can be printed on the non-structural surface of the cards, which also enriches the form of the cards; part of the patterns can also be printed on the structural surface, with various forms and rich functions.

The present invention will be described in further detail below with reference to the accompanying drawings and examples; however, the micro-nano structure cards provided by the present invention and the use method thereof are not limited to the examples.

In order to facilitate the understanding of the technical idea and the inventive spirit of the present invention, the present invention will be described below with different embodiments, but these embodiments are only examples for illustrating the technical idea of the present invention, and are not intended to limit the protection scope of the present invention. Explanation in advance.

Example 1: Referring to Fig. 1, a micro-nano structured card of the present invention includes a plurality of card bodies made of colorless or colored transparent or translucent plastic films 1 to form a deck of playing cards, with 54 card bodies , the structural surface of the plastic film 1 is provided with a micro-nano structure 2 formed by thermocompression molding, UV transfer printing or nano-imprinting, and the micro-nano structure 2 is a diffractive optical element (Diffractive Optical Elements) or a holographic diffractive optical element. (Holographic Diffractive Optical Elements). Differentiation information is uploaded on the micro-nano structure 2.

In this embodiment, the distinguishing feature on each card is the pattern of playing cards, including four suits of hearts, spades, diamonds and clubs, patterns of each suit from 1 to 13, and big and small kings (ghost cards). ).

Various suits, from 1 to 13, with increasingly complex patterns. If the conventional micro-nano structure design method is used, and the same micro-nano structure is used to manufacture, the fog surface formed by the pattern formed by the micro-nano structure on each card on the plastic film 1 will be visible to the naked eye under ordinary light. The color difference can be seen, and the size of the card can be inferred based on the color difference, so the privacy protection is relatively poor, making the game unjust.

In order to improve the privacy of cards, that is, no matter whether the patterns on the cards are simple or complex, there is no color difference and no difference can be seen with the naked eye, the present invention creatively proposes that for the micro-nano structure on the structural surface of various cards The structure is adjusted as follows: The etching depth of the micro-nano structure is adjusted, the etching depth of the micro-nano structure on the card with the simpler pattern is deeper, and the etching depth of the micro-nano structure on the more complex card is shallower.

For example, a card with a suit pattern of 1 to 5 has a micro-nanostructure etched to a depth of 1.20 μm to 1.5 μm, and a card with a suit pattern of 6 to 10 has a micro-nanostructure etched to a depth of 0.8 μm. ~1.0 micron, the suit pattern is 11~13, that is, the pattern is king K, queen Q and attendant J and big and small kings (ghost cards), and the etching depth of the micro-nanostructures on it is 0.1 microns ~ 0.6 microns.

In another adjustment scheme, the order of DOE on the card is adjusted, that is, different times of photolithography are used for different cards in the process to form micro-nano structures of different orders on the card, and the suit pattern is 1 ~5 cards, the DOE on it is the DOE of the eighth order after three lithography, the suit pattern is 6~10, the DOE on it is the fourth order after two lithography, the pattern is 11~13 and the size The card of the king (ghost card) obtains the second-order micro-nano structure for one lithography.

The more lithography, the darker the matte color on the plastic film of the card. Cards with simple patterns use the order with more lithography times, and cards with more complex patterns use the order with fewer lithography times. In this way, it is possible to adjust the matte color of a card with different complexity of playing cards so that the color of the matte surface cannot be distinguished by the naked eye. In a specific adjustment scheme, the wavelength is set to 520 nm. For cards with simple patterns, the etching depth of the first lithography is 577.2 nm, the second is 288.6 nm, and the second is 144.3 nm.

For cards with more complex patterns, secondary lithography is used to obtain a fourth-order DOE. In these two lithography, the etching depth of the first lithography is 577.2 nm, and the second lithography is 288.6 nm.

For cards with more complex patterns, a second-order DOE is obtained by one photolithography, and the etching depth in this photolithography is 577.2 nm.

The foregoing is only an example to explain and illustrate the means for adjusting the order of the micro-nano structures, and should not be construed as a limitation on the means.

Regarding the order of the micro-nano structure of each card, it can also be that each card in a set of cards has the same order, which can be the second order, the fourth order or the eighth order. The higher the number of orders, the higher the diffraction efficiency of the pattern appearing under irradiated light. However, increasing the order will increase the production cost. In yet another adjustment solution, the adjustment of the etching depth and order of the micro-nano structures on each of the above-mentioned cards can be combined. Such adjustment can make the privacy protection of the card made of the transparent plastic film more ideal.

In yet another adjustment scheme, a colored transparent plastic film is used as the card body. By using a colored plastic film, such as a plastic film like sunglasses, the light transmittance is reduced, and the visual chromatic aberration of the micro-nano structures on each card can be made consistent, so as to achieve a perfect anti-peeping effect.

In yet another adjustment scheme, as shown in FIG. 2 , a coating layer 7 is provided on the structural surface of the plastic film 1 , which can change the light transmittance of the cards, making cards with simple patterns and cards with complex patterns The chromatic aberrations of the micro-nano structures on the surface are basically the same and are not easy to distinguish, so as to enhance the privacy protection performance. In this adjustment scheme, the coating material can be any light-transmitting material. Here, as an example, it can be aluminum, and the coating can use processes such as evaporation, ionization, and sputtering. No matter which process is used, the thickness of the coating is based on the light transmittance of the obtained plastic film of 20 to 90%. There is no visual difference between cards with different information to achieve privacy protection by adjusting the light transmittance of the plastic film.

In actual use, one or several or all of several measures of adjusting the etching depth, etching times, using colored plastic film and setting optical coating can be adopted for the card. Through the reasonable cooperation of several measures, it is possible to achieve Ideal privacy protection.

Using a colored transparent plastic film as the card body and setting a coating layer on the card can make the light of the point light source that illuminates the light softer and make the imaging effect more comfortable and soft.

For cards made of plastic films made of colorless and transparent materials, a good privacy protection effect can be achieved by adjusting the etching depth and lithography times of the micro-nano structures on them. For the use of colorless and transparent plastic films to make game cards, these methods are needed to solve the problem of visual chromatic aberration.

If a colored transparent plastic film can be used to make a card, the problem of visual chromatic aberration can also be better solved, a better anti-peeping effect can be achieved, and its economy is better.

For cards with colored and transparent plastic film, it can also be combined with the cooperation of the coating layer.

For cards made of colorless and transparent plastic films, the problem of visual chromatic aberration can ideally be solved by using a coating layer. At this time, the etching depth and order of the micro-nano structures on each card in a set of game cards can be the same, which is more economical.

Tests have proved that the use of colored transparent plastic film and the setting of a coating layer on the plastic film to reduce the light transmittance will not affect the imaging effect.

The micro-nano structures on the aforementioned structural planes are 3D micro/nano structures.

The playing cards provided in the above embodiments can be viewed with the naked eye under ordinary light, and neither the card holder nor the opponent can see the difference in color difference from the card surface, and it is impossible to guess the big and small cards, achieving a full 360-degree Azimuth privacy. The holder needs to look at a point light source (such as an LED light 6 ) through the plastic film 1 to read the distinguishing information on the micro-nano structure 2 (as shown in FIG. 3 ). For example, when using such a deck of playing cards, an LED light 6 can be placed in the middle, and the user sits around the LED light 6 and reads the distinguishing information of the card surface through the LED light 6 respectively. You can also put the card in your hand on the table, and the LED light 5 or the flashlight of the mobile phone can shine on the card surface of the card 1 (as shown in Figure 4), and you can also see the difference information on the card surface.

2毫米以內重複排列；例如單元可以是1

1毫米，重複排列在結構面上的一個設定的區域內，這樣，只要點光源照射在該區域的任何位置，都可以呈現牌上的圖案。The unit size of the micro/nano structures on the structural surface can be in the range of 2 mm

Repeat arrangement within 2mm; for example unit can be 1

1 mm, repeatedly arranged in a set area on the structural surface, so that as long as the point light source illuminates any position in the area, the pattern on the card can be presented.

Embodiment 2: Referring to FIG. 5 and FIG. 6, the difference from the previous embodiment is that the non-structural surface of the plastic film 1' of this embodiment is provided with a first printing pattern 3'.

Embodiment three: Referring to FIG. 7 , the difference from the second embodiment is that a part of the structural surface of the plastic film 1 ″ of this embodiment is provided with a second printing pattern 4 ′, and the pattern of the second printing pattern 4 ′ is The information can be consistent with the above-mentioned difference information. In this way, this card can be used like a normal card except for reading the difference information through the light source.

Embodiment 4: In this embodiment, the cards are a set of 12 cards, and the colored plastic film is used as the card body. The patterns formed by the nano-structured DOE elements arranged on the structural surface of each card are "Dream of Red Mansions" respectively. The characters in Jinling Twelve Hairpins, the etching depth and order of the nanostructures of the DOE elements on each card are the same. In this embodiment, another solution of the micro-nano structure card provided by the present invention is given, that is, the distinguishing features of the micro-nano structure on each card in a set of cards are still related to each other, or There is coherence, but not a playing card. By developing such a deck, the use range of the cards provided by the present invention can be broadened.

The sets of Jinling Twelve Hairpins provided in this embodiment can be sold as a set or sold separately.

The present invention is the first to propose to use DOE or HDOE to design a pattern on a transparent plastic film to make a complete set of cards. The distinguishing information recorded on the micro-nano structure on the card is consistent and the distinguishing characteristics of each card are consistent and consistent. / or logical relationship, can be made into game cards, etc., adding new expressions and new varieties to this type of game cards. Further, in order to meet the privacy protection requirements of the game cards, the present invention creatively adjusts the micro-nano structures on each card, such as the etching depth, the order of the micro-nano structures, etc., and can also adjust the plastic film. To increase the light transmittance, a colored plastic film is used and a coating layer is arranged on the plastic film. In summary, the various measures can make the card 360° all-round privacy protection.

For game cards, for example, the complexity of the patterns of each card varies greatly, which can be prevented by adjusting the number of lithography of each card, that is, the order of the micro-nano structure; for a set of cards, each card The pattern complexity of the cards is relatively similar, and privacy can be prevented by adjusting the etching depth of the micro-nano structures on each card. Using a colored transparent film or setting a coating layer on the card has a good effect of adjusting the visual chromatic aberration on the surface of the card, and can also improve its aesthetics.

The above embodiment is only used to further illustrate a micro-nano structure card of the present invention and its use method, but the present invention is not limited to the embodiment, any simple modification made to the above embodiment according to the technical essence of the present invention, Equivalent changes and modifications all fall within the protection scope of the technical solutions of the present invention.

1: plastic film 2: Micro-nano structure 5: LED lights 6: LED lights 7: Coating layer 1': plastic film 3': The first printing pattern 1'': plastic film 4': Second printing pattern

1 is a schematic structural diagram of a single-layer micro-nano structure DOE card formed by one-time photolithography in the preferred embodiment 1 of the micro-nano structure card provided by the present invention.

2 is a schematic cross-sectional view of a preferred embodiment 1 of the micro-nano structured card provided by the present invention, where a coating layer is provided on the structural surface of the card.

FIG. 3 is a schematic diagram showing the pattern on the card by facing the micro-nano structure card provided by the present invention to the LED light.

FIG. 4 is a schematic diagram showing the pattern on the card by irradiating the micro-nano structure card provided by the present invention with an LED light.

FIG. 5 is a schematic structural plane structure diagram of the second preferred embodiment of the micro-nano structure card provided by the present invention.

FIG. 6 is a schematic diagram of a non-structured surface structure of a preferred embodiment 2 of the micro-nano structured card provided by the present invention.

FIG. 7 is a schematic structural view of the structure plane of the preferred embodiment 3 of the micro-nano structure card provided by the present invention.

1: plastic film

6: LED lights

Claims (10)

A micro-nano structured card, comprising a card body made of a plurality of transparent or translucent plastic films, one side surface of the plastic film is a structural surface, and the back of the plastic film is a non-structural surface, The grating micro-nano structure is provided on the structure surface by thermocompression molding or UV transfer printing, and the grating micro-nano structure carries distinguishing information, and the content of the distinguishing information is different on each card. A micro-nano structured card, comprising a card body made of several transparent or translucent plastic films, one side surface of the plastic film is a structural surface, and the back of the plastic film is a non-structural surface; A micro-nano structure is arranged on the structure surface, and the micro-nano structure carries distinguishing information. The micro-nano structure card includes a plurality of cards, each of which is on the structure surface. The distinguishing features carried by the micro-nano structures are different, but the patterns formed by the distinguishing features on each of the cards are logically related in content, so that all the cards form a set of cards . The micro-nano-structured card according to any one of claim 1 or 2, wherein, when viewed with the naked eye under ordinary light, there is no difference between the cards in a set of the cards, so that all the cards on the cards are indistinguishable. The above-mentioned distinguishing features cannot be distinguished; and/or, each said card can be seen with the naked eye under ordinary light, 360-degree full-angle privacy protection, that is, it will appear on all said cards in a set of said card decks at any angle The haze surface is visually the same; and/or, the structure surface is a microstructure, or a nanostructure; and/or, the unit size of the micro-nanostructure on the structure surface is 2 mm

Repeated arrangement within 2 millimeters; and/or, the unit size of the micro-nano structures on the structural surface is (0.5~2) millimeters

(0.5~2) millimeters are repeatedly arranged; and/or, the micro-nano structures on the structural surface are 3D micro/nano structures. The micro-nano structure card according to claim 2, wherein a micro-nano structure formed by thermocompression molding, UV transfer printing or nano-imprinting is provided on the structural surface. The micro-nano structure card according to claim 3, wherein, in a set of the card set, the anti-privacy adjustment means is at least one of the following measures: Method 1: The etching depth of the micro-nano structures on the structural surface of each of the card bodies is not the same; Method 2: The order of the micro-nano structures on each of the cards in the set of cards is the same; or, the order of the micro-nano structures on each of the cards is inexhaustible same; Method 3: the plastic film is made of colored transparent material; Method 4: A coating layer is arranged on the surface of the plastic film to adjust the visual color difference of each of the cards. The micro-nanostructured card of claim 5, wherein: In the method 1, the etching depth of the micro-nano structure is different according to the complexity of the pattern of each of the cards, and the micro-nano structure on the card with the simpler pattern is different The etching depth of the micro-structure is relatively deep, and the etching depth of the micro-nanostructure on the card with the more complex pattern is relatively shallow; and/or, In the means 1, the etching depth on each of the cards is between 0.1 um and 3 um; and/or, In the means 2, the order of the micro-nano structure is different according to the complexity of the pattern of each of the cards; the micro-nano structure on the card with the simpler pattern The order of the micro-structure is more, and the order of the micro-nano structure on the card with the more complex pattern is less; and/or, In the means 2, the micro-nano structures on the structural surface of each of the cards are photoetched 1 to 5 times to form second-order, fourth-order, eighth-order, sixteenth-order or Thirty-two steps of the micro-nano structure to change the effect of the haze color of the micro-nano structure; and/or, In the means 4, the coating layer is a colored and transparent coating; and/or, In the means 4, the coating film is provided, and the light transmittance parameter of the coating film layer is 20 to 90%, so as to adjust the visual chromatic aberration of each of the cards; and/or, In the means 4, the coating material of the coating layer is aluminum, or silver, or gold, or platinum, or nickel; and/or, In the means 4, the coating layer is provided on the structure surface. The micro-nano structure card according to any one of claims 1 or 2, wherein the grating micro-nano structure is a diffractive optical element or a holographic diffractive optical element. The micro-nanostructured card according to any one of claims 1 or 2, wherein the non-structured surface of the plastic film is provided with a first printing pattern; or, the plastic film a portion of the non-structured surface is provided with the first printed pattern; and/or, A part of the structural surface of the plastic film is provided with a second printing pattern. The micro-nano structure card of claim 8, wherein the content of the second printing pattern is consistent with the content of the distinguishing information. A method of using a micro-nano structure card, comprising the micro-nano structure card as described in any one of claims 1 to 9; looking at the light source through the plastic film to read the difference information ; Or, the light source illuminates the plastic film to present the distinguishing information.

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