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Suigen, South Korea

Patent
Nanobrick Co. | Date: 2013-11-14

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.


Patent
Nanobrick Co. | Date: 2014-02-03

A reflective display device according to the present invention comprises a first unit cell containing a first fluid in which first charged particles are dispersed; a second unit cell containing a second fluid in which second charged particles are dispersed; an electric field applying unit for applying an electric field to the first and second unit cells; and a control unit for controlling colors displayed from the first and second unit cells by adjusting an intensity of the applied electric field, wherein the first and second particles do not move when the electric field is applied with an intensity less than each of threshold values thereof, and move when the electric field is applied with an intensity equal to or higher than each of the threshold values thereof, and wherein the threshold values of the first and second particles are set to be different from each other.


Patent
Nanobrick Co. | Date: 2015-05-27

Provided is a reflective display device, including: a display part including first particles having an electric charge and a first color, capsules having a second color, and a light transmissive fluid in which the first particles and the capsules are dispersed; an electric field applicator for applying an electric field to the display part; and a controller for controlling the color displayed by the display part by adjusting at least one of the intensity and the direction of the electric field applied to the display part, wherein the position of the capsules in the display part is passively determined depending on the position of the first particles that are moved by the electric field.


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.


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.

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