Abstract: A reflective-type color display according to the present disclosure includes a lower substrate and an upper substrate, a polarization plate positioned on an outer surface of the upper substrate, a plurality of helical photonic crystals arranged between the lower substrate and the upper substrate and having different reflection properties of light in the visible region, and a tunable wave plate positioned on the plurality of helical photonic crystals to control the reflection intensity by continuously changing the phase retardation. According to an embodiment, it is possible to simultaneously achieve the features of three primary colors, analog grey levels, high resolution, and fast response through the separation of the function of color reflection from the intensity tuning capability of the photonic crystal, beyond the limitation of existing reflective-type display technology.

Abstract: A light-modulated quantum dot (QD) color display according to an embodiment of the present disclosure includes a light source, a light modulator positioned above the light source to control the intensity of light generated from the light source, and a QD light-emitting element positioned above the light modulator and including a plurality of QD patterns having different emission properties in the visible light region by means of light intensity that has passed through the light modulator. According to an embodiment, the QD pattern is configured to accomplish light emission with uniformity and high color purity by uniform distribution of QDs in a matrix using aligned polymer, thereby simultaneously achieving the features of uniform emission of light over the entire pixel, intensity-tunability giving analog grey levels, and high color purity and wide color gamut without using a color filter beyond the limitation of existing QD color display technology.

Abstract: A method for manufacturing an optical sensor includes forming a reflective metal layer on a substrate, forming an insulator layer on the reflective metal layer, inducing self-assembly of a metal nanostructure layer on the insulator layer, and selectively etching the insulator layer through a reactive ion etching process to form a plurality of pillars and a plurality of spaces defined by the plurality of pillars. The method for manufacturing a plasmonic optical sensor according to this embodiment facilitates the formation of nanostructures difficult to pattern and form on the large scale at a low cost, and provides a plasmonic optical sensor with repeatability.

Abstract: A light-modulated quantum dot (QD) color display according to an embodiment of the present disclosure includes a light source, a light modulator positioned above the light source to control the intensity of light generated from the light source, and a QD light-emitting element positioned above the light modulator and including a plurality of QD patterns having different emission properties in the visible light region by means of light intensity that has passed through the light modulator. According to an embodiment, the QD pattern is configured to accomplish light emission with uniformity and high color purity by uniform distribution of QDs in a matrix using aligned polymer, thereby simultaneously achieving the features of uniform emission of light over the entire pixel, intensity-tunability giving analog grey levels, and high color purity and wide color gamut without using a color filter beyond the limitation of existing QD color display technology.

Abstract: A method for manufacturing an optical sensor includes forming a reflective metal layer on a substrate, forming an insulator layer on the reflective metal layer, inducing self-assembly of a metal nanostructure layer on the insulator layer, and selectively etching the insulator layer through a reactive ion etching process to form a plurality of pillars and a plurality of spaces defined by the plurality of pillars. The method for manufacturing a plasmonic optical sensor according to this embodiment facilitates the formation of nanostructures difficult to pattern and form on the large scale at a low cost, and provides a plasmonic optical sensor with repeatability.

Abstract: A reflective-type color display according to the present disclosure includes a lower substrate and an upper substrate, a polarization plate positioned on an outer surface of the upper substrate, a plurality of helical photonic crystals arranged between the lower substrate and the upper substrate and having different reflection properties of light in the visible region, and a tunable wave plate positioned on the plurality of helical photonic crystals to control the reflection intensity by continuously changing the phase retardation. According to an embodiment, it is possible to simultaneously achieve the features of three primary colors, analog grey levels, high resolution, and fast response through the separation of the function of color reflection from the intensity tuning capability of the photonic crystal, beyond the limitation of existing reflective-type display technology.

Abstract: A vertical-type organic light-emitting transistor for reducing the off-state leakage current to improve the current and on-off ratio includes a gate electrode, a lower semiconductor layer disposed on the gate electrode, a source electrode disposed on the lower semiconductor layer, and a source insulation film disposed on the source electrode and covering top and sides of the source electrode, wherein the lower semiconductor layer is configured such that an electric charge is injected into the lower semiconductor layer from the source electrode when voltage is applied to the gate electrode.

Abstract: A vertical-type organic light-emitting transistor for reducing the off-state leakage current to improve the current and on-off ratio includes a gate electrode, a lower semiconductor layer disposed on the gate electrode, a source electrode disposed on the lower semiconductor layer, and a source insulation film disposed on the source electrode and covering top and sides of the source electrode, wherein the lower semiconductor layer is configured such that an electric charge is injected into the lower semiconductor layer from the source electrode when voltage is applied to the gate electrode.

Abstract: The present invention includes forming a hydrophobic thin film on a substrate, removing a portion of the first hydrophobic thin film to form a first hydrophilic region, coating a first organic solution on the substrate and selectively wetting the first hydrophilic region, drying the first organic solution to form a first organic thin film pattern in the first hydrophilic region, forming a second hydrophobic thin film on the first organic thin film pattern, coating a second organic solution and selectively wetting the second organic solution, and drying the second organic solution to form a second organic thin film pattern.

Abstract: A liquid crystal display panel may include a first substrate, a second substrate facing the first substrate and including a plurality of colloidal particles obtained by thermally treating a surface of the second substrate facing the first substrate, and a liquid crystal layer interposed between the first and second substrates to contain liquid crystal molecules. The size of each of the plurality of colloidal particles may vary according to the length of time heat is applied.

Abstract: The present disclosure provides an artificial iris prepared by forming a ring-shaped hydrophilic region on a biocompatible substrate, coating a curable material thereon and then coating a photoreactive material mimicking the iris frills through optical irradiation. The artificial iris may be implemented into the real human eye and is capable of regulating the intensity of the light reaching the retina through the pupil depending on the intensity of ambient light.

Abstract: A display device includes a first substrate, a middle layer, a first liquid crystal layer, a second substrate, a pixel part and a second liquid crystal layer. A first common electrode is on the first substrate. The middle layer includes a lenticular array, and a control electrode on the lenticular array. The control electrode faces the first common electrode. The first liquid crystal layer is between the middle layer and the first substrate, and a second common electrode is on a back side of the middle layer. The pixel part includes a plurality of pixel electrodes on the second substrate and facing the second common electrode. The second liquid crystal layer is between the second common electrode and the pixel part.

Abstract: An organic light-emitting transistor may include a mesh-type source electrode having a plurality of apertures in an array pattern. The mesh-type source electrode may be located between the gate electrode and the drain electrode. The organic light-emitting transistor adopting a mesh-type source electrode may show quasi-surface emission characteristics similar to that of the organic light-emitting diode. Moreover, an aperture ratio, brightness, and light emission efficiency of the organic light-emitting transistor may be superior to those of an organic light-emitting diode. Another advantage is that the production cost may be reduced since an additional driving element such as a thin-film-transistor is not needed.

Abstract: A method of forming a high resolution organic thin film pattern, the method including forming a first organic layer on a substrate; selectively removing the first organic layer by selectively irradiating light energy onto the first organic layer, and forming a remaining part of the first organic layer as a sacrifice layer; forming a second organic layer on the substrate and the entire surface of the sacrifice layer; and lifting off the second organic layer formed on the sacrifice layer by removing the sacrifice layer using a solvent, and forming the remaining second organic layer as a second organic layer pattern.

Abstract: The present disclosure provides an artificial iris prepared by forming a ring-shaped hydrophilic region on a biocompatible substrate, coating a curable material thereon and then coating a photoreactive material mimicking the iris frills through optical irradiation. The artificial iris may be implemented into the real human eye and is capable of regulating the intensity of the light reaching the retina through the pupil depending on the intensity of ambient light.

Abstract: A liquid crystal display panel may include a first substrate, a second substrate facing the first substrate and including a plurality of colloidal particles obtained by thermally treating a surface of the second substrate facing the first substrate, and a liquid crystal layer interposed between the first and second substrates to contain liquid crystal molecules. The size of each of the plurality of colloidal particles may vary according to the length of time heat is applied.

Abstract: A method for manufacturing a substrate for alignment of a liquid crystal may include: forming a vertical alignment layer on a substrate; performing an alignment process on the vertical alignment layer in a first direction; forming a protective layer at a partial region of the vertical alignment layer; performing an alignment process on other regions of the vertical alignment layer in a second direction; and removing the protective layer. A liquid crystal display device manufactured using the substrate for alignment of a liquid crystal ensures wide viewing angle and alignment stability with relatively simple processes as compared with the conventional vertically aligned (VA) mode liquid crystal display device.

Abstract: A display device includes a first substrate, a middle layer, a first liquid crystal layer, a second substrate, a pixel part and a second liquid crystal layer. A first common electrode is on the first substrate. The middle layer includes a lenticular array, and a control electrode on the lenticular array. The control electrode faces the first common electrode. The first liquid crystal layer is between the middle layer and the first substrate, and a second common electrode is on a back side of the middle layer. The pixel part includes a plurality of pixel electrodes on the second substrate and facing the second common electrode. The second liquid crystal layer is between the second common electrode and the pixel part.

Abstract: An organic electronic device including: a first layer including a conductive or semiconductive organic material; a second layer including a conductive or semiconductive inorganic material, and in contact with the first layer; and an interface layer between the first layer and the second layer, wherein the interface layer includes a conductive or semiconductive organic material and a conductive or semiconductive inorganic material.

Abstract: Provided is a method for manufacturing liquid droplet microarrays, including: providing a lower substrate on which microstructures are patterned; providing an upper substrate to which one or more liquid path lines and a liquid reservoir are linked at both sides thereof; placing the upper substrate over the lower substrate; and arranging liquid droplets in microarrays on the structures of the lower substrate by allowing a liquid contained in the liquid reservoir to flow though the liquid path lines. Provided also are liquid droplet microarrays obtained by the method, a device for delivering a material including the liquid droplet microarrays, and a method for delivering a material through the device.