A forgery and falsification prevention device includes: a variable material containing unit that contains a variable material in which reflected light or transmitted light is changed in response to an application of a display stimulus; and an operation unit that performs a function of changing a dis
A forgery and falsification prevention device includes: a variable material containing unit that contains a variable material in which reflected light or transmitted light is changed in response to an application of a display stimulus; and an operation unit that performs a function of changing a display state of the variable material when an external stimulus is applied, by changing light reflection characteristics or light transmission characteristics of the variable material or changing the display stimulus which is applied to the variable material.
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1. A forgery and falsification prevention device, comprising: a variable substance container to contain a variable substance in which a reflected light or transmitted light is changed as a display stimulus is applied thereto; anda movable part to perform a function of changing a display state of the
1. A forgery and falsification prevention device, comprising: a variable substance container to contain a variable substance in which a reflected light or transmitted light is changed as a display stimulus is applied thereto; anda movable part to perform a function of changing a display state of the variable substance by changing light reflection characteristics or light transmission characteristics of the variable substance or changing the display stimulus applied to the variable substance, in response to a given external stimulus,wherein the variable substance includes a first medium having a first refractive index and a second medium having a second refractive index,wherein the first medium and the second medium are regularly arranged,wherein the particles having a refractive index different from the first refractive index are dispersed in the first medium, andwherein at least one of the first medium and the second medium where particles are dispersed is scattered in the form of a droplet within a light-transmissive material. 2. The forgery and falsification prevention device of claim 1, wherein the display stimulus includes at least one of an electric field, a magnetic field, temperature, humidity, pressure, and light. 3. The forgery and falsification prevention device of claim 1, wherein the movable part is moved, rotated, or deformed in response to the given external stimulus to change at least one of intensity, direction, and pattern of the display stimulus applied to the variable substance. 4. The forgery and falsification prevention device of claim 3, wherein the movable part is moved, rotated, or deformed in response to the given external stimulus to position the variable substance container in a region where the display stimulus is applied. 5. The forgery and falsification prevention device of claim 3, wherein the movable part is moved, rotated, or deformed in response to the given external stimulus to position the variable substance contained in the variable substance container in a region where the display stimulus is applied. 6. The forgery and falsification prevention device of claim 3, further comprising a display stimulus generator to generate a display stimulus operable for being applied to the variable substance container, wherein the movable part is moved, rotated or deformed in response to the given external stimulus to position the display stimulus generator in a region where the display stimulus can be applied to the variable substance. 7. The forgery and falsification prevention device of claim 1, wherein at least one of the variable substance container and the movable part is operable for being irreversibly fractured by the external stimulus, and wherein when at least one of the variable substance container and the movable part is irreversibly fractured, the light reflection characteristics or light transmission characteristics of the variable substance, which show in response to application of the display stimulus, are changed compared with before at least one of the variable substance container and the movable part is irreversibly fractured. 8. The forgery and falsification prevention device of claim 1, wherein in the variable substance container, the display state of a first region to which the display stimulus is applied is different from the display state of a second region to which the display stimulus is not applied. 9. The forgery and falsification prevention device of claim 1, wherein at least one of the variable substance container and the movable part is configured in the form of at least one of a container plug, a tag, a card, a film, a sticker, and an identification code. 10. The forgery and falsification prevention device of claim 1, wherein the variable substance includes a solution in which particles are dispersed, and the intervals or positions of the particles are changed according to the change in an electric field or a magnetic field. 11. The forgery and falsification prevention device of claim 1, wherein the variable substance includes at least one of a fluorescent material, a phosphorescent material, a quantum dot material, a temperature indicating material, and an optically variable pigment (OVP) material. 12. The forgery and falsification prevention device of claim 1, wherein the first medium and the second medium are alternately stacked. 13. The forgery and falsification prevention device of claim 1, wherein the phase or refractive index of at least one of the first medium and the second medium is changed in response to the application of the display stimulus. 14. The forgery and falsification prevention device of claim 1, wherein the first medium includes a curable material, and wherein when the curable material is cured while the particles are regularly arranged at predetermined intervals in the first medium by the display stimulus, the first medium is cured, and thus the state of the particles being regularly arranged at predetermined intervals in the first medium is irreversibly fixed. 15. The forgery and falsification prevention device of claim 1, further comprising an additional forgery and falsification prevention means using at least one of a hologram, radio frequency identification (RFID), and biometric information recognition. 16. The forgery and falsification prevention device of claim 1, further comprising a display stimulus generator to generate an electric field as a display stimulus operable for being applied to the variable substance container when an electromagnetic wave is applied, wherein the movable part is moved, rotated, or deformed in response to the application of the external stimulus, to position the display stimulus generator in a region where the electromagnetic wave is applied, and when the display stimulus generator is positioned in a region where the electromagnetic wave is applied, an electric field generated by the display stimulus generator is applied to the variable substance container, thereby changing the display state of the variable substance. 17. The forgery and falsification prevention device of claim 16, wherein the electromagnetic wave includes an electromagnetic wave generated during a near field communication (NFC) or radio frequency identification (RFID) process.
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이 특허에 인용된 특허 (1)
Takahashi, Kenichi, Liquid device, liquid device manufacturing apparatus and method, and image display device.
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