Lg Chem, Ltd

Other

Samsung Display Co., Ltd.

Min Young Kang

Ki Yong Chang

Min Woo Jung

Dong Hoon Lee

Dong Uk Heo

Boon Jae Jang

Mi Yeon Han

Jung Oh Huh

Tae Yoon Park

Jung Ha Lee

Jeong Wook Mun

Seongmi Cho

Seong Mi Cho

Jung Hoon Yang

Mi Young Chae

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

Heterocyclic compound and organic light emitting device comprising the same

Provided is a compound of Formula 1: where X is O or S; Aris 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 Aris a functional group of Formula 2 below, with the proviso that Arand Arare different from each other, where Aris 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.

Compound and organic light emitting device comprising the same

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, E&#x3e;Eand E&#x3e;E, and having improved driving voltage, efficiency, and lifetime.

Organic light emitting device

Provided is a compound of Chemical Formula 1 or 2: wherein: Xto Xare N or CH, with the proviso that at least one of Xto Xis N; Y is O or S; Land Lare each independently a single bond or a substituted or unsubstituted Carylene; and Ar is a substituted or unsubstituted Calkyl, a substituted or unsubstituted Chaloalkyl, a substituted or unsubstituted Ccycloalkyl, a substituted or unsubstituted Caryl, or a substituted or unsubstituted Cheteroaryl containing one to three heteroatoms selected from the group consisting of N, O, and S, and an organic light emitting device including the same.

A lifting belt includes a lifter configured to generate a tractive force in a longitudinal direction of a spinal column by expansion, a left connector and a right connector respectively disposed on a left side and a right side of the lifter, and a central connector attachable to or detachable from the left connector and the right connector.

Lifting belt

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.

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.

Wrist protector

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

Knee brace

Belt bandage

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.

Growing community of inventors

Seoul, South Korea

Min Young Kang