Abstract: Provided is a heterocyclic compound Chemical Formula 1 or 2: and an organic light emitting device comprising the same.

Abstract: Provided is a compound of Formula 1: where X is O or S; Ar1 is an aryl having 6 to 20 carbon atoms substituted with at least one functional group selected from the group consisting of cyano, pyridinyl, benzimidazolyl and diphenylphosphine oxide, or a substituted or unsubstituted heteroaryl having 3 to 20 carbon atoms containing at least one N; and Ar2 is a functional group of Formula 2 below, with the proviso that Ar1 and Ar2 are different from each other, where Ar3 is an aryl having 6 to 20 carbon atoms, and m is an integer of 0 to 2, and an organic light emitting device comprising the same.

Abstract: The present invention provides an organic light emitting device having improved driving voltage, efficiency and lifetime.

Abstract: The present invention relates to an organic light emitting device comprising a light emitting layer and an electron transport layer which satisfy the following mathematical expressions, EHOMO-ET?EHOMO-BH and ELUMO-ET>ELUMO-GH, and having improved driving voltage, efficiency, and lifetime.

Abstract: A wrist protector includes a contact pad to be worn on a wrist of a user, a plurality of air tubes disposed on the contact pad, a pump configured to inject air from an outside into the plurality of air tubes, and a discharge valve configured to discharge the air stored in the plurality of air tubes to the outside.

Abstract: The present disclosure provides a novel heterocyclic compound and an organic light emitting device comprising the same.

Abstract: A lifting belt may include a lifter configured to generate a tractive force along a longitudinal direction of a spinal column by expansion, and a left connector and a right connector respectively disposed on a left side and a right side of the lifter and connectable to each other.

Abstract: A knee retractor according to an embodiment comprises: an upper frame, which is positioned on the thigh, and which has an upper retracting member provided on an end thereof; a lower frame, which is positioned on the lower leg region, and which has a lower retracting member provided on an end thereof so as to be able to engage with the upper retracting member and to rotate accordingly; and a band portion configured to surround the thigh and the lower leg region, the upper frame and the lower frame being mounted on the band portion, wherein contacting parts of the upper and lower retracting members can be positioned on the front side of the knee joint.

Abstract: A resonator oscillator that may be included in a gas sensing system may include an oscillator that may be electrically connected to an external resonator through a conductive line. The oscillator may generate an oscillating signal having a frequency corresponding to a resonance frequency of the external resonator in an oscillating path. A spurious resonance removal circuit on the oscillating path may remove spurious resonance caused by the conductive line from the oscillating path. A gas sensing system may include the oscillator, a resonator that includes a sensor configured to sense a gas, and a frequency counting logic that receives the oscillating signal and a reference clock signal, performs a counting operation on the oscillating signal according to a logic state of the reference clock signal to generate a counted value, and generate a gas sensing output indicating a sensed gas based on the counted value.

Abstract: A display device includes a circular display panel, an encapsulation substrate on the circular display panel, and an optical element interposed between the circular display panel and the encapsulation substrate, the optical element including a light guide member having a ring shape to correspond to a boundary of the circular display panel, the light guide member configuring a boundary of the optical element.

Abstract: A display device includes a circular display panel, an encapsulation substrate on the circular display panel, and an optical element interposed between the circular display panel and the encapsulation substrate, the optical element including a light guide member having a ring shape to correspond to a boundary of the circular display panel, the light guide member configuring a boundary of the optical element.

Abstract: The present invention provides a composition comprising ginseng extract, red ginseng extract or ginsenosides as active ingredients for the prevention, slowed progression, and treatment of macular degeneration. More specifically it provides pharmaceutical composition to improve visual function by regenerating the transport characteristics of Bruch's membrane. The present invention provides a composition comprising ginseng extract, red ginseng extract or ginsenosides as active ingredients to maintain and protect visual function in the normal population and restore deficits in visual function in the elderly population. More specifically it provides a composition to improve visual function by regenerating the transport characteristics of Bruch's membrane.

Abstract: The present invention relates to a method and system for sterilizing the soil for growing Korean ginseng by using an electron beam, which eliminates fungi harmful to ginseng's growth and development, and also relates to a system including: a conveyor which transfers the soil for growing Korean ginseng; a soil supplier which loads a predetermined amount of soil onto the conveyor to a predetermined height; an electron beam irradiator which applies electron beam to the soil for growing Korean ginseng being transferred by the conveyor to eliminate fungi contained in the soil for growing Korean ginseng; and an antagonistic rhizobacteria supplier which adds antagonistic rhizobacteria to the sterilized soil.

Abstract: The present invention relates to a method and system for sterilizing the soil for growing Korean ginseng by using an electron beam, which eliminates fungi harmful to ginseng's growth and development, and also relates to a system including: a conveyor which transfers the soil for growing Korean ginseng; a soil supplier which loads a predetermined amount of soil onto the conveyor to a predetermined height; an electron beam irradiator which applies electron beam to the soil for growing Korean ginseng being transferred by the conveyor to eliminate fungi contained in the soil for growing Korean ginseng; and an antagonistic rhizobacteria supplier which adds antagonistic rhizobacteria to the sterilized soil.