Lg Chem, Ltd

Electronics and Telecommunications Research Institute

Jungbum Kim

Yongbum Cha

Sung Kil Hong

Seongmi Cho

Sang Duk Suh

Jin Joo Kim

Jiwon Kwak

Sung Jae Lee

Dong Uk Heo

Byounggun Choi

Hyungil Park

Kyungsoo Kim

Taewook Kang

Junghwan Hwang

Sungeun Kim

Kyunghwan Park

Sungweon Kang

Taeyoung Kang

Ingi Lim

Changhee Hyoung

The present specification relates to a hetero-cyclic compound represented by the following Chemical Formula 1, and an organic light emitting device including the same. Such hetero-cyclic compound used as a material for an organic material layer of an organic light emitting device improves efficiency, achieves low driving voltage, and/or improves service life characteristics. [Chemical Formula 1]

Heterocyclic compound and organic light emitting diode containing same

The present specification relates to a compound and an organic electronic device comprising the same.

Compound and organic electronic element comprising same

The present specification relates to a spiro compound and an organic electronic device including the same.

Spiro-structured compound and organic electronic device comprising same

The present specification relates to a hetero-cyclic compound and an organic light emitting device including the same.

The present specification provides an amine-based compound and an organic light emitting device comprising the same.

Amine-based compound and organic light-emitting element comprising same

Heterocyclic compound and organic light emitting element comprising same

The present specification provides a compound having a spiro structure, and an organic light emitting device including the same.

Spiro-type compound and organic light emitting element comprising same

The present specification provides a compound having a spiro structure of Chemical Formula 1, and an organic light emitting device including the same.

Disclosed is a power management apparatus and a multi-source energy harvesting system using the apparatus, which manage power supplied by individual harvesting sources without wasting the power, thus efficiently distributing the power to a battery. The power management apparatus includes a plurality of comparison units configured to compare voltages of storage devices respectively connected to output terminals of a plurality of harvesting power sources with a preset threshold voltage. A control unit is configured to control an operation of the power management apparatus. A plurality of switching units are installed between the storage devices and a battery and are configured to be turned on/off in response to switching control signals output from the control unit and to form power transmission paths between corresponding storage devices and the battery. The control unit generates and provides the switching control signals based on output signals of the comparison units.

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Daejeon, South Korea

Jungbum Kim