Abstract: Disclosed is an AlNiCo-based hard magnetic particle containing Al, Ni, Co, Cu, Ti, and the balance of Fe. The AlNiCo-based hard magnetic particle contains Co in an amount of 10 to 17 wt %, has a coercive force of 250-450 Oe, and has a residual magnetization/coercive force rate of 0.06 or more. The AlNiCo-based hard magnetic particle according to the present invention can advantageously guarantee magnetic properties suitable for being detected by a magnetic reluctance device due to a low content of Co.

Abstract: Disclosed are a magnetic particle and a security ink containing the same. The magnetic particle includes a magnetic core, and a metal coating layer formed outside the magnetic core. The magnetic particle has a surface roughness (Ra) of 0.15 ?m or less. The magnetic particle according to the present invention is suitable for application to a security ink because an abnormal increase in particle size does not occur after the metal coating layer is formed.

Abstract: Disclosed is a plastic product with authenticity to be determined, the plastic product including: a base made of a plastic material, and a luminescent material included in the base and configured to emit light including a second wavelength with respect to incident light including a first wavelength, in which the determination of the authenticity is performed by irradiating the plastic product with the incident light and then detecting the emitted light. According to the present invention, it is possible to easily determine the authenticity of the plastic product by a simple method of detecting a spectrum of the light emitted from the plastic product.

Abstract: A method for producing a three-dimensional security element and an injection-molded product having the three-dimensional security element and, more specifically, to a method for producing a three-dimensional security element suitable for an in-mold process by using a moiré expansion phenomenon, and for producing an injection-molded product to which the three-dimensional security element is applied. The present invention according to one embodiment comprises a three-dimensional security element and an injection-molded product having the three-dimensional security element, wherein the three-dimensional security element further comprises: a micro lens array to which various types of lenses can be applied; an image array; a primer layer for facilitating adhesion; and a projection film for protecting the three-dimensional security element from heat and pressure.

Abstract: The present invention according to one embodiment comprises a three-dimensional security element and an injection-molded product having the three-dimensional security element, wherein the three-dimensional security element further comprises: a micro lens array to which various types of lenses can be applied; an image array; a primer layer for facilitating adhesion; and a protection film for protecting the three-dimensional security element from heat and pressure. According to the configuration above, the present invention can implement three-dimensional effects, such as a latent image effect, a floating effect, and an inverted parallax effect, wherein an effect is determined by a period rate and a matching angle between the micro lens array and the image array.

Abstract: Disclosed herein is a light guide panel for a backlight unit of a liquid crystal display (LCD). The light guide panel enables adjustment in viewing angle and brightness at a specific position and angle by controlling a cross-sectional shape of front prisms of the light guide panel.

Abstract: The present disclosure provides a counterfeit detector which identifies whether a security document or the like is authentic by irradiating UV rays from UV LEDs onto fluorescent security marks formed on the security document. UV rays emitted from the UV LEDs are independently condensed and reflected, thus enabling a user to more effectively identify the fluorescent security marks that are formed in special shapes using UV fluorescent material.

Abstract: A light guide panel includes a lateral side configured to transmit light to an interior of the light guide panel, a rear side configured to reflect light to the interior of the light guide panel, and a front side configured to emit light from the interior of the light guide panel, wherein the rear side includes a repeating pattern of regions, each region having a plurality of wedge-shaped rear prisms disposed therein, and the wedge-shaped rear prisms include at least one of a side having a predetermined radius of curvature and a side having a point of inflection.

Abstract: Disclosed herein is a light guide panel for a backlight unit of a liquid crystal display (LCD). The light guide panel enables adjustment in viewing angle and brightness at a specific position and angle by controlling a cross-sectional shape of front prisms of the light guide panel.

Abstract: A light guide panel includes a lateral side configured to transmit light to an interior of the light guide panel, a rear side configured to reflect light to the interior of the light guide panel, and a front side configured to emit light from the interior of the light guide panel, wherein the rear side includes a repeating pattern of regions, each region having a plurality of wedge-shaped rear prisms disposed therein, and the wedge-shaped rear prisms include at least one of a side having a predetermined radius of curvature and a side having a point of inflection.