Abstract: Disclosed is a paste composition for printing including conductive powders, a binder, a dispersing agent, and a solvent. The dispersing agent includes a block copolymer of polyethylene oxide (PEO)-polypropylene oxide (PPO)-polyethylene oxide (PEO), or a block copolymer of polypropylene oxide (PPO)-polyethylene oxide (PEO)-polypropylene oxide (PPO).

Abstract: The present invention relates to a light extraction substrate for an organic light emitting element and, more specifically, to a light extraction substrate for an organic light emitting element that can enhance the light extraction efficiency of the organic light emitting element by optimizing a stack structure that can maximize scattering efficiency, and an organic light emitting element comprising the same.

Abstract: The present invention relates to a method for manufacturing a light extraction substrate for an organic light-emitting diode and, more specifically, to a method for manufacturing a light extraction substrate for an organic light-emitting diode, which can improve light extraction efficiency of an organic light-emitting diode and can also remarkably reduce a manufacturing process, manufacturing costs, and manufacturing time.

Abstract: The present invention relates to an organic light-emitting device for lighting, and more specifically relates to an organic light-emitting device for lighting whereby it is possible to achieve excellent brightness by increasing the light-emitting area per unit area of an organic light-emitting element. For this purpose, the present invention provides an organic light-emitting device comprising: a first substrate and a second substrate disposed facing each other; a frame section which is formed between the first substrate and the second substrate, and is formed on the periphery of the first substrate and the second substrate so as to hermetically close the space between the first substrate and the second substrate; and a flexible organic light-emitting element which is disposed inside of the space, and of which at least one part has a curved surface.

Abstract: The present invention relates to a method for manufacturing a film for an optoelectronic element and, more specifically, to a method for manufacturing a film for an optoelectronic element, which can improve the optical characteristics of an optoelectronic element and can be applied to even flexible optoelectronic elements. To this end, the present invention provides the method for manufacturing a film for an optoelectronic element, comprising: a bubble generation step for generating a large quantity of bubbles inside a polymer resin by stirring the polymer resin; a bubble density control step for controlling the density of the bubbles inside the polymer resin by exposing, to vacuum, the polymer resin in which bubbles are generated; and a coating film formation step for forming a coating film having a plurality of pores dispersed therein by coating and drying the polymer resin on a substrate.

Abstract: The present invention relates to a light extraction substrate for an organic light emitting element, a method for manufacturing the same, and an organic light emitting element comprising the same and, more particularly, to a light extraction substrate for an organic light emitting element exhibiting a good light extraction efficiency, a method for manufacturing the same, and an organic light emitting element comprising the same. To this end, the present invention provides a light extraction substrate for an organic light emitting element, a method for manufacturing the same, and an organic light emitting element comprising the same, the light extraction substrate comprising a first light extraction layer having a plurality of pores formed therein and made of a first metal oxide doped with a dopant; and a second light extraction layer formed on the first light extraction layer and made of a second metal oxide which has a different atomic diffusion rate compared to the first metal oxide.

Abstract: The present invention relates to an organic light-emitting element and, more specifically, to an organic light-emitting element having a bottom emitting structure. To this end, the present invention provides the organic light-emitting element, comprising: a substrate; a light extraction layer formed on the substrate and having an exposure part which exposes the substrate; a flat layer for covering the substrate and the light extraction layer and having a flat top surface; an anode electrode formed on the flat layer; an organic light-emitting layer formed on the anode electrode; and a cathode electrode formed on the organic light-emitting layer in the same form as the light extraction layer.

Abstract: The present invention relates to a substrate for a photoelectric device and a photoelectric device comprising the same and, more specifically, to a substrate for a photoelectric device and a photoelectric device comprising the same capable of guaranteeing the flatness of thin-films forming the photoelectric device and the structural stability of a functional thin-film formed to improve the characteristics of the photoelectric device, thereby maintaining the function of the functional thin-film. To this end, the present invention provides a substrate for a photoelectric device and a photoelectric device comprising the same, the substrate comprising: a base substrate; a concave-convex structure formed on the base substrate, in which the surface of the concave-convex structure forms a concave-convex pattern; and a planarization layer formed on the concave-convex structure, the planarization layer being formed of a 2-dimensional material.

Abstract: Provided herein is an external-cavity type wavelength tunable laser including gain medium configured to generate an optical signal and amplify the generated optical signal based on a bias current applied; an external reflector configured to be coupled optically with the gain medium; a second thermistor provided on the side of the gain medium and configured to measure a temperature of the gain medium; a first thermistor provided on the external reflector and configured to measure a temperature of the external reflector; and a thermoelectric cooler configured to transfer generated heat based on the temperatures measured by the first and second thermistors.

Abstract: Provided are a high-speed superluminescent diode, a method of manufacturing the same, and a wavelength-tunable external cavity laser including the same. The superluminescent diode includes a substrate having an active region and an optical mode size conversion region, waveguides including an ridge waveguide in the active region and a deep ridge waveguide in the optical mode size conversion region connected to the active waveguide, an electrode disposed on the ridge waveguide; planarizing layers disposed on sides of the ridge waveguide and the deep ridge waveguide on the substrate, and a pad electrically connected to the electrode, the pad being disposed on the planarizing layers outside the active waveguide.

Abstract: Provided herein is an external-cavity type wavelength tunable laser including gain medium configured to generate an optical signal and amplify the generated optical signal based on a bias current applied; an external reflector configured to be coupled optically with the gain medium; a second thermistor provided on the side of the gain medium and configured to measure a temperature of the gain medium; a first thermistor provided on the external reflector and configured to measure a temperature of the external reflector; and a thermoelectric cooler configured to transfer generated heat based on the temperatures measured by the first and second thermistors.

Abstract: A light extraction substrate which can realize a superior light extraction efficiency when applied to an organic light-emitting device, and an organic light-emitting device having the same. The light extraction substrate includes a base substrate and a matrix layer. One surface of the matrix layer adjoins to the base substrate, and the other surface of the matrix layer adjoins to an organic light-emitting diode. The light extraction substrate also includes a rod array disposed inside the matrix layer. The rod array includes at least one rod which is arranged in a direction normal to the one surface of the matrix layer. The rod array and a cathode of the organic light-emitting diode form an antenna structure which guides light generated from the organic light-emitting diode to be emitted in the normal direction.

Abstract: The present invention aims to provide a composite optical device which includes the day-time optical device, thermal imaging optical device, laser application device and displaying device while reducing the volume and weight, further comprising attenuator that can control the amount of light for easy display on the display. The present invention also aims to provide a composite optical device with enhanced efficiency of transmitting laser and easy operability by installing the attenuator at an appropriate location.

Abstract: Provided herein is a tunable external cavity laser comprising: a gain medium configured to create an optical signal; an external reflector configured to be coupled to the gain medium, and to comprise a Bragg grating; and a phase control section configured to adjust a phase of an entire laser, but to adjust a wavelength of the laser to a longer wavelength than a peak reflectivity of the external reflector.

Abstract: The present invention relates to a novel ursolic acid derivative as an ursolic acid prodrug form, and to a method for preparing same, wherein the novel ursolic acid derivative as an ursolic acid prodrug can have excellent pharmacokinetic characteristics such as stability and oral absorptivity and exhibit excellent pharmaceutical activities by being converted into an ursolic acid in vivo. The ursolic acid derivative can be in an ester form in which C28 carboxylic acid in the ursolic acid is combined with a prodrug of a certain pharmaceutical compound.

Abstract: The present invention relates to a novel ursolic acid derivative as an ursolic acid prodrug form, and to a method for preparing same, wherein the novel ursolic acid derivative as an ursolic acid prodrug can have excellent pharmacokinetic characteristics such as stability and oral absorptivity and exhibit excellent pharmaceutical activities by being converted into an ursolic acid in vivo, and. The ursolic acid derivative can be in an ester form in which C28 carboxylic acid in the ursolic acid is combined with a prodrug of a certain pharmaceutical compound.

Abstract: Disclosed is a wavelength tunable laser apparatus, including: a first substrate configured to reflect inflow laser light, and tune a wavelength of the reflected laser light; and a second substrate configured to adjust a gain of the laser light input from the first substrate, reflect a specific wavelength of the laser light, and adjust a phase of oscillated laser light, in which the first substrate and the second substrate are formed in a single package form.

Abstract: Provided are a high-speed superluminescent diode, a method of manufacturing the same, and a wavelength-tunable external cavity laser including the same. The superluminescent diode includes a substrate having an active region and an optical mode size conversion region, waveguides including an ridge waveguide in the active region and a deep ridge waveguide in the optical mode size conversion region connected to the active waveguide, an electrode disposed on the ridge waveguide; planarizing layers disposed on sides of the ridge waveguide and the deep ridge waveguide on the substrate, and a pad electrically connected to the electrode, the pad being disposed on the planarizing layers outside the active waveguide.

Abstract: A secret key generation apparatus and method are provided. The secret key generation apparatus includes at least one antenna, amplification/phase controllers, a transceiver, and a random signal controller. The antenna receives a wireless signal from a counterpart terminal that performs wireless communication. The amplification/phase controllers control the amplification gain and phase of the wireless signal that is received via at least one antenna. The transceiver measures the status of a wireless channel using the wireless signal having the controlled amplification gain and phase, determines parameters based on results of the measurement, and generates a secret key based on results of the determination. The random signal controller controls the amplification/phase controllers so that the amplification gain and phase are adjusted whenever the transceiver generates a secret key.

Abstract: An apparatus includes a user input unit, a display unit, a control unit, and a buffer unit. The display unit includes a speed setting menu. The control unit selects a mode from the speed setting menu in response to the selection signal of the user, and controls a compression ratio of a voice codec and a transfer rate of a modem corresponding to a transmission-side radio, and a reception rate of a modem and a restoration rate of a voice codec corresponding to a reception-side radio, based on the selected mode. The buffer unit performs a storage function if there is a difference between the compression ratio of the voice codec and the transfer rate of the modem or if there is a difference between the reception rate of the modem and the restoration rate of the voice codec.