Disclosed are a color-variable element, and methods for producing and controlling same. The color-variable element comprises a first electrode, a second electrode, and an electrophoretic layer disposed therebetween, wherein the electrophoretic layer comprises a dispersion medium and charge-coated flat first particles. The color-variable element controls the position of the first particles via voltage and the rotational angle of same via pulsed signals.
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
G02F 1/1685 - Operation of cellsCircuit arrangements affecting the entire cell
G02F 1/1679 - GasketsSpacersSealing of cellsFilling or closing of cells
Disclosed are an electrically variable transmittance film and a method of manufacturing the same. The electrically variable transmittance film includes a base film, a first transparent electrode layer formed on the base film, a transparent non-conductive layer forming a pattern on the first transparent electrode layer, a variable transmittance layer formed on the transparent non-conductive layer, and including particles movable by an electric field, and a second transparent electrode layer formed on the variable transmittance layer.
Disclosed are a film with electrically controllable transparency and a method for manufacturing same. The film with electrically controllable transparency comprises: a base film; a first transparent electrode layer formed on the base film; a transparent non-conductor layer forming a pattern on the first transparent electrode layer; a transparency controllable layer formed on the transparent non-conductor layer and including particles movable by an electric field; and a second transparent electrode layer formed on the transparency controllable layer.
The present invention relates to a method for manufacturing an apparatus for preventing forging and falsification, which comprises: a dispersion step of manufacturing a dispersion liquid by dispersing, in a liquid medium, first particles of which one or more optical characteristics from among the color of reflected light, the spectrum of the reflected light, and the strength or penetration degree of the reflected light are changed in accordance with a viewing angle or the position of a light source, and second particles which are moved or reconfigured by a magnetic field being applied thereto; a capsule manufacturing step of encapsulating the dispersion liquid using a medium that transmits light; and a step of forming a security device layer by printing the capsule on a substrate, wherein the second particles move by means of application of an external magnetic field, and the first particles move by means of the movement of the second particles, such that the color, pattern, or steric effect by the first particles is reversibly changed, and the first particles and the second particles are reconfigured from the initial configuration thereof to another configuration.
B42D 25/369 - Magnetised or magnetisable materials
G02F 1/00 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics
G02F 1/1673 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by magnetophoresis
G02F 1/09 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
H01F 1/055 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
H01F 1/00 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties
H01F 1/44 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
5.
COSMETIC COMPOSITION FOR BEAUTY CARE PACK CAPABLE OF CHECKING USAGE TIME, METHOD FOR PREPARING SAME, AND METHOD FOR USING SAME
Disclosed are a cosmetic composition for a beauty care pack capable of checking the usage time, a method for preparing same, and a method for using same. The cosmetic composition for a beauty care pack capable of checking the usage time may be prepared by dispersing first color particles having magnetic properties and second color particles having no magnetic properties in a cosmetic oil to prepare a liquid material, encapsulating the liquid material to generate pigment capsules, and mixing the pigment capsules with a cosmetic composition for a pack.
The present invention relates to a method for manufacturing a forgery and falsification prevention device and, more specifically, to a method for manufacturing a forgery and falsification prevention device comprising a security printing layer which implements color change or stereoscopic effects according to viewing angles or light source locations by using particles moved or rearranged by a magnetic field applied thereto and particles having optical properties varying according to viewing angles, wherein security information is reversibly or irreversibly formed.
B42D 25/369 - Magnetised or magnetisable materials
G02F 1/00 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics
G02F 1/1673 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by magnetophoresis
G02F 1/09 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
H01F 1/055 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
H01F 1/00 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties
H01F 1/44 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
7.
SECURITY MEDIUM PRINTED ON WHICH COLOR CODE FOR SECURITY INFORMATION IS PRINTED USING MAGNETICALLY COLOR TURNABLE PHOTONIC CRYSTAL INK, AND MANUFACTURING METHOD THEREFOR
The present invention relates to a security medium having a surface on which a color code for security information is printed using magnetically color turnable photonic crystal ink (MTX), wherein: the color code is a color, a pattern, an image and/or data printed using the MTX; the color, the pattern, the image and/or the data are variably displayed according to an observation angle; and the color, the pattern, the image and/or the data displayed at at least one particular observation angle is information obtained by decoding the color code.
G02F 1/09 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
8.
Display device, display method and machine readable storage medium
In a display method or device according to one embodiment of the present invention, at least two of a photonic crystal reflection mode, a unique color reflection mode and a transmittance tuning mode may be implemented to be switched to each other within the same unit pixel. In addition, a machine readable storage medium recording a computer program performing the display method is provided.
G02F 1/17 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on variable-absorption elements not provided for in groups
G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
G02F 1/25 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour for the control of the colour as to hue or predominant wavelength
G02F 1/23 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour for the control of the colour
G02F 1/21 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour by interference
B82Y 20/00 - Nanooptics, e.g. quantum optics or photonic crystals
Disclosed is a method for manufacturing a display apparatus including a display layer and a substrate having a common electrode. The method comprises: a step of forming a plurality of individual electrodes and a connecting electrode on a substrate; a step of removing at least a part of any one of the substrate or the display layer to form a connecting area; a step of bonding the substrate and the display layer; a step of removing at least a part of any one of the substrate or the display layer to expose the connecting electrode and the common electrode to the outside; and a step of charging a conductive material into the connecting area to electrically connect the connecting electrode and the common electrode.
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
10.
DEVICE FOR PREVENTING COUNTERFEITING AND FALSIFYING
A device according to the present invention for preventing counterfeiting and falsifying is characterized by comprising: a magnetically variable material including part including a magnetically variable material in which reflected light or transmitted light is changed when an applied magnetic field is changed; a magnetic field generating part for generating a magnetic field that can be applied to the magnetically variable material; and a spacer interposed between the magnetically variable material including part and the magnetic field generating part, and controlling the distance between the magnetically variable material including part and the magnetic field generating part.
The present invention relates to microparticles which are rearranged by the application of an electric field or a magnetic field and contain a color nanocomposite including nanoparticles, and to a method for manufacturing the microparticles, wherein, in the microparticles, the pencil hardness in a dry powder state is 4B or less; and the pore volume of the region of 5 nm or less is 20% or less of the total pore volume in the pore size distribution according to the specific surface area measurement using nitrogen gas, and the pore volume of the region of 3 nm or less is 20% or less of the total pore volume in the pore distribution according to the specific surface area measurement using argon gas.
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
An apparatus for preventing counterfeiting and alteration according to the present invention includes a magnetic changeable substance carrier part containing a magnetic changeable substance to vary reflected or transmitted light rays as an applied magnetic field is varied; a magnetic field generation part for generating a magnetic field applied to the magnetic changeable substance; and a moveable part for varying at least one of the intensity, direction and pattern of the magnetic field applied to the magnetic changeable substance according to an externally applied stimulus so as to change the appearance of the magnetic changeable substance.
B42D 25/369 - Magnetised or magnetisable materials
G01N 21/66 - Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence
G07D 7/04 - Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint
G01N 21/25 - ColourSpectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
G07D 7/00 - Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
The present invention relates to a color display device configured of a display layer including a color display material, and a magnetic layer including a magnetic material stacked on top of the display layer to form a pattern. By stacking the patterned magnetic layer on top of the display layer of the color display material, the effects are obtained by being able to present certain colors, images, and information by means of the color display material, so that a user can easily discern same. Also, the color display device of the present invention is configured of: a display layer including a color display material; and a first magnetizing material layer including a magnetizing material and stacked at the bottom of the display layer. Because the color display material is disposed at the bottom of the display layer, the effects are obtained by being able to stably control the arrangement and spacing of color display material particles on an externally applied magnetic field, so that formed colors, images, and information can be maintained even after the magnetic field is removed.
G02B 26/00 - Optical devices or arrangements for the control of light using movable or deformable optical elements
G02F 1/09 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
G09F 9/00 - Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
14.
COLOR DISPLAY DEVICE CAPABLE OF DISPLAYING VARIOUS LOCAL COLORS AND DISPLAY METHOD THEREFOR
The present invention relates to a color display device capable of displaying various local colors and a display method therefor. The present invention provides a display device structure combining first particles (photonic crystal particles), which exhibit a specific color by means of movement and arrangement of the particles when a magnetic field or an electric field is applied, and second particles that are in charge of a local color of the color display device in a non-driven state, which does not react either to the magnetic field nor to the electronic field.
A reflective display device includes a display part including a fluid having dispersed therein particles having charges, an electric field applying unit including an electrode for applying an electric field to the display part, and a controller for controlling a color of light emitted from the display part, by adjusting at least one of an intensity, polarity, application time, number of applications, and application cycle of a voltage applied to the electric field applying unit, wherein the controller resets an alignment state of the particles by applying a driving voltage for controlling the color of light emitted from the display part, and then applying an alternating-current (AC) voltage having a polarity opposite to that of the driving voltage.
G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
16.
Reflective display particle, reflective display device, and method for manufacturing the same
Provided is a method for manufacturing a reflective display particle, the method including: (a) preparing first and second dispersion solutions by dispersing first and second reflective display materials that reflect light in different wavelength ranges into first and second media that contain a curable material and are unmixed with each other, respectively; (b) forming an emulsion by mixing the prepared first and second dispersion solutions, and encapsulating the emulsion into a capsule; and (c) having the first and second dispersion solutions contained in the encapsulated emulsion undergo phase separation, and curing the phase-separated first and second dispersion solutions by applying energy to the phase-separated first and second dispersion solutions.
G02B 26/00 - Optical devices or arrangements for the control of light using movable or deformable optical elements
G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
G02F 1/29 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the position or the direction of light beams, i.e. deflection
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
B01J 13/18 - In situ polymerisation with all reactants being present in the same phase
G02B 26/02 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
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.
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
G02F 1/29 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the position or the direction of light beams, i.e. deflection
G07D 7/02 - Testing electrical properties of the materials thereof
B42D 25/36 - Identification or security features, e.g. for preventing forgery comprising special materials
G02F 1/09 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
G02F 1/19 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on variable-reflection or variable-refraction elements not provided for in groups
Color pigments; pigments; organic pigments; powdered paints; paints; label printing inks; special effect printing inks; micro-encapsulated fragrance inks; optically variable or color-changing paints; paints in which particles capable of changing colors or optical properties of the paints are dispersed; paints in which powders capable of changing colors or optical properties of the paints are dispersed; optically variable or color-changing inks; inks in which particles capable of changing colors or optical properties of the inks are dispersed; inks in which powders capable of changing colors or optical properties of the inks are dispersed.
19.
Method for controlling optical transmissions, device for controlling optical transmissions, and method for manufacturing same
According to the method for controlling optical transmissions according to the present invention, in a state where particles formed of a light-blocking material, a first solvent with electro-wetting properties in which the particles are dispersed, and a second solvent which is not mixed with the first solvent are present in a space covered by an optical incident surface, the particles are mixed with the first solvent but not mixed with the second solvent, and an electric field applied to the first solvent is controlled so as to control the blocking area of the first solvent with respect to the optical incident surface and control optical transmittance.
G02B 26/02 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
G02B 26/00 - Optical devices or arrangements for the control of light using movable or deformable optical elements
A reflective display device according to the present invention comprises: a display unit comprising a fluid in which particles having electric charges are dispersed; an electric field applying unit comprising an electrode applying an electric field for the display unit; and a control unit controlling colors displayed on the display unit by adjusting at least one of the intensity, direction, application time, number of applications and application cycle of a voltage applied to the electric field applying unit, wherein the control unit initializes an arrangement of the particles by applying an alternating current (AC) voltage which is in the direction opposite to a driving voltage, after applying the driving voltage for controlling the colors displayed on the display unit.
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
22.
REFLECTIVE DISPLAY DEVICE AND METHOD FOR CONTROLLING SAME
A reflective display device according to the present invention comprises: a first unit cell containing a first fluid in which first particles having electric charges are dispersed; a second unit cell containing a second fluid in which second particles having electric charges are dispersed; an electric field application unit applying an electric field to the first unit cell and the second unit cell; and a control unit adjusting an intensity of the applied electric field to thereby control colors displayed by the first unit cell and the second unit cell, wherein a threshold value of the first particles and a threshold value of the second particles are set to be different from each other.
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
A forgery and falsification prevention device according to the present invention 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.
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
G06K 9/18 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints using printed characters having additional code marks or containing code marks, e.g. the character being composed of individual strokes of different shape, each representing a different code value
24.
Display method, film and display device using magnetic particles
A display device and a display method using magnetic particles are disclosed. The display method includes: applying a first magnetic field to a plurality of particles in a state where the plurality of particles having a magnetic property and a certain color are dispersed in a solvent so that the plurality of particles are aligned in a direction parallel to a direction of the first magnetic field, and thus a plurality of particle chains are formed; and applying a second magnetic field to at least a part of the formed plurality of particle chains so that at least a part of the plurality of particle chains moves in a direction close to a display surface in an area to which the second magnetic field is applied, and thus the certain color is displayed on the display surface.
A47F 11/06 - Means for bringing about special optical effects
B44F 1/00 - Designs or pictures characterised by special or unusual light effects
G09F 19/12 - Advertising or display means not otherwise provided for using special optical effects
G09F 19/02 - Advertising or display means not otherwise provided for incorporating moving display members
G09F 9/37 - Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
An apparatus for preventing counterfeiting and alteration according to the present invention includes: a magnetic changeable substance carrier part containing a magnetic changeable substance to vary reflected or transmitted light rays as an applied magnetic field is varied; a magnetic field generation part for generating a magnetic field applied to the magnetic changeable substance; and a moveable part for varying at least one of the intensity, direction and pattern of the magnetic field applied to the magnetic changeable substance according to an externally applied stimulus so as to change the appearance of the magnetic changeable substance.
Disclosed is a display device using magnetic particles. The display method using magnetic particles according to the present invention includes: (a) applying a first magnetic field to a plurality of particles in a state where the plurality of particles having magnetism and a predetermined color are dispersed in a solvent to allow the plurality of particles to be aligned in a direction parallel to that of the first magnetic field, thereby forming a plurality of particle chains; and (b) applying a second magnetic field to at least a portion of the plurality of particle chains to allow said portion of the plurality of particle chains to move toward a side adjacent to a display surface in a region to which the second magnetic field is applied, thereby displaying the predetermined color on the display surface.
H01F 10/08 - Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
B43L 1/00 - Repeatedly-usable boards or tablets for writing or drawing
G09F 9/00 - Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
G09B 23/18 - Models for scientific, medical, or mathematical purposes, e.g. full-sized device for demonstration purposes for physics for electricity or magnetism
27.
METHOD FOR CONTROLLING OPTICAL TRANSMISSIONS, DEVICE FOR CONTROLLING OPTICAL TRANSMISSIONS, AND METHOD FOR MANUFACTURING SAME
According to the method for controlling optical transmissions according to the present invention, in a state where particles formed of a light-blocking material, a first solvent with electrowetting properties in which the particles are dispersed, and a second solvent which is not mixed with the first solvent are present in a space covered by an optical incident surface, the particles are mixed with the first solvent but not mixed with the second solvent, and an electric field applied to the first solvent is controlled so as to control the blocking area of the first solvent with respect to the optical incident surface and control optical transmittance.
G02B 26/02 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
28.
Preparation method of magnetic cluster colloid and magnetic cluster colloid prepared thereby
Seoul National University R&DB Foundation (Republic of Korea)
Nanobrick Co., Ltd. (Republic of Korea)
Inventor
Lee, Jin Kyu
Cha, Jin Myung
Abstract
This invention relates to a manufacturing method of colloid comprising magnetic nanoclusters and magnetic nanocluster colloid made by the same. More particularly, this invention relates to a manufacturing method of colloid comprising magnetic nanoclusters comprising magnetic precursor and heterometal precursor by a certain ratio and magnetic nanocluster colloid made by the same.
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor
B01J 13/00 - Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided forMaking microcapsules or microballoons
H01F 1/01 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials
H01F 1/44 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
B82Y 30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites
29.
SURFACE TREATMENT METHOD FOR MAGNETIC PARTICLES, MAGNETIC COMPOSITE PREPARED THEREBY, AND MAGNETIC COMPOSITE FOR LABELING TARGET MATERIALS
The present invention relates to a surface treatment method for magnetic particles, a magnetic composite prepared thereby, and a magnetic composite for labeling target materials. More specifically, the invention relates to a surface treatment method for magnetic particles and a magnetic composite having excellent dispersibility prepared thereby, wherein the surface treatment method comprises the steps of: performing the acid-treatment of magnetic particles and mixing the acid-treated magnetic particles with a water-soluble solvent in order to form a hydroxyl group (-OH) on the surface of the magnetic particles; and mixing the magnetic particles, in which the hydroxyl group is formed, with a surface treatment agent containing an organic ligand, which can be bonded to the hydroxyl group, so that the organic ligand is treated on the surface of the magnetic particles.
A61K 47/48 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers, inert additives the non-active ingredient being chemically bound to the active ingredient, e.g. polymer drug conjugates
The present invention provides a method of changing color or transmittance of light on a surface part of an object. The surface part of the object includes a solvent and a plurality of particles dispersed in the solvent. When electric field is applied to the solvent and the plurality of particles, the transmittance of color or light on the surface part of the object is changed due to the change of the inter-particle distances or the positions of the particles, according to the magnitude, direction, application time or application frequency of electric field, wherein the magnitude, direction, application time or application frequency of electric field are changed by associating the input signal by the user of the object or the signal acquired by the object or the signal acquired by the sensing unit provided to the object.
G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
G02F 1/17 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on variable-absorption elements not provided for in groups
G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
G02F 1/23 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour for the control of the colour
G02B 1/00 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements
G02B 26/02 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
G02B 26/00 - Optical devices or arrangements for the control of light using movable or deformable optical elements
B82Y 20/00 - Nanooptics, e.g. quantum optics or photonic crystals
G02F 1/21 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour by interference
31.
Display method and device using photonic crystal characteristics
A display method and device using photonic crystal characteristics are disclosed. In the display method using photonic crystal characteristics in accordance with the present invention, when a plurality of particles having electric charges are dispersed in a solvent, an electric field is applied to control inter-particle distance.
According to one embodiment of the present invention, a composite film comprising a display region for preventing forgery is provided. The display region comprises a magnetic solution distributed in a curing medium. The magnetic solution is a colloidal solution in which a plurality of magnetic particles charged in the same polarity are dispersed in fluid, and an expressive material is present in the curing medium and is separate from the magnetic solution, wherein at least one of reflectivity and transmittance of the expressive material changes when a magnetic field is applied and a predetermined characteristic of the expressive material is expressed when a specific energy is applied.
In a display method or device according to one embodiment of the present invention, at least two modes selected from among a photonic crystal reflection mode, a unique color reflection mode, and a transmittance tuning mode are interchangeable in a single pixel. Additionally, a machine-readable storage medium storing a computer program for executing the display method is provided.
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
34.
METHOD FOR DISPLAYING SURFACE AND APPARATUS THEREOF
The present invention relates to a method for changing a color or a light transmittance of a surface part of a target along one side. The surface part of the target includes a solvent and a plurality of particles dispersed within the solvent. The gaps among the particles or the positions of a plurality of particles are changed when the electric field is applied to the solvent and a plurality of particles. The color or the light transmittance of the surface part of the target is changed according to the strength, direction, applied time or applied number of the electric field. The strength, direction, applied time or applied number of the electric field are changed in association with an input signal through a user using the target, a signal obtained through the target or a signal obtained through a sensing means provided to the target.
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
G02F 1/23 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour for the control of the colour
35.
Printing medium, printing method, and printing apparatus using photonic crystal characteristic
The present invention provides a printing medium, a printing method, and a printing apparatus using a photonic crystal characteristic. According to the present invention, the printing medium using the photonic crystal characteristic comprises a medium in which a plurality of particles having electric charges are dispersed, wherein the inter-particle distances of the particles are controlled as a result of at least one of electric fields and magnetic fields are applied to the medium, and the inter-particle distances of the particles are fixed as the energy is applied to the medium.
B41J 2/00 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
B41J 2/06 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
G02B 6/34 - Optical coupling means utilising prism or grating
G02B 6/10 - Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
36.
PREPARATION METHOD OF MAGNETIC CLUSTER COLLOID, AND MAGNETIC CLUSTER COLLOID PREPARED THEREBY
The present invention relates to a preparation method of a colloid containing magnetic nanoclusters, and a magnetic nanocluster colloid prepared thereby. More specifically, the present invention relates to a preparation method of a colloid containing magnetic nanoclusters, which comprises a magnetic precursor and precursor of heterometals in a predetermined ratio, and a colloid containing magnetic nanoclusters prepared thereby.
B01J 13/00 - Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided forMaking microcapsules or microballoons
H01F 1/44 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
B82B 3/00 - Manufacture or treatment of nanostructures by manipulation of individual atoms or molecules, or limited collections of atoms or molecules as discrete units
37.
Display method and device using photonic crystal characteristics
A display method and device using photonic crystal characteristics are disclosed. In the display method using photonic crystal characteristics when a plurality of particles having electric charges is dispersed in a solvent, an electric field is applied to control inter-particle distance.
Disclosed is a method and apparatus which use an indicator having electromagnetic properties. The indicating method using electromagnetic properties according to the present invention is characterized by a plurality of particles which have both electric charge and magnetic properties and which indicate a first color when dispersed in a solvent indicating a second color. At least one color of either the first and / or the second color is indicated, when at least one of either the electric charge and / or magnetic properties induces the indication of at least one color, which is determined by the direction in which the particles move, which, in turn, is determined by the amount of magnetic force or electric charge applied according to preset calibration.
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
39.
PRINTING MEDIUM, PRINTING METHOD, AND PRINTING APPARATUS USING PHOTONIC CRYSTAL CHARACTERISTIC
The present invention provides a printing medium, a printing method, and a printing apparatus using a photonic crystal characteristic. According to the present invention, the printing medium using the photonic crystal characteristic comprises a medium in which a plurality of particles having electric charges are distributed, wherein the intervals between the particles are controlled as a result of at least one of electric fields and magnetic fields are applied to the medium, and the intervals between the particles are fixed as the energy is applied to the medium.
B41M 5/36 - Thermography using a polymeric layer, which may be particulate and which is deformed or structurally changed with modification of its properties, e.g. of its optical, hydrophobic-hydrophilic, solubility or permeability properties
40.
DISPLAY METHOD AND APPARATUS USING THE PROPERTIES OF PHOTONIC CRYSTALS
Disclosed are a display method and apparatus using the properties of photonic crystals. The display method using the properties of photonic crystals according to the present invention involves applying electric fields to particles having electric charges when the particles are dispersed in a solvent in order to control the space between the particles.
G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
