Abstract: The present invention relates to novel organic electroluminescent materials and organic light emitting devices comprising the same. Since the organic electroluminescent materials according to the invention have good luminous efficiency and life property as an electroluminescent material, OLED's having very good operation lifetime can be produced.

Abstract: The present invention relates to novel organic electroluminescent compounds and organic light emitting diodes comprising the same. Since the organic electrolumescent compounds according to the invention have good luminous efficiency and life property as an electroluminescent material, OLED's having very good operation lifetime can be produced.

Abstract: A shared key management method for a Supervisory Control And Data Acquisition (SCADA) system in which a master terminal unit (MTU), a plurality of sub master terminal units (SUB-MTUs), and a plurality of remote terminal units (RTUs) are configured in a sequential hierarchy, is provided.

Abstract: An antenna device of a portable wireless terminal is provided. The device includes a mainboard, a slot cover, and an electrical connection unit. The mainboard includes a feed part connected to a Radio Frequency (RF) connector. The slot cover opens/closes a slot formed in a case frame forming an appearance of the portable wireless terminal in order to connect to a connector of an external apparatus, and includes an antenna radiator for transmitting/receiving a signal in a relevant frequency band. The electrical connection unit electrically connects the slot cover with the feed part. Therefore, the antenna device may improve a radiation performance by securing a space of the antenna radiator without increasing the volume of the terminal.

Abstract: The present invention relates to organic electroluminescent compounds and electroluminescent devices comprising the same as host material. The electroluminescent compounds according to the invention are characterized by having three ligands, two bivalent metals and a monovalent anion derived from an inorganic or an organic acid.

Abstract: A filter assembly for a vacuum cleaner is provided, and the filter assembly comprises a discharge grill formed on a discharge passage, a filter member mounted on the discharge grill, and a gasket member that is detachably connected between the discharge grill and the filter member and seals a space between the discharge grill and the filter member.

Abstract: The present invention relates to novel red phosphorescent compounds exhibiting high luminous efficiency, and organic electroluminescent devices comprising the same.

Abstract: A cyclone dust-separating apparatus includes a cyclone unit having air inflow and air outflow parts that separate dust or dirt from air, the cyclone unit being installed such that a longitudinal axis thereof is substantially horizontally arranged; a dust bin joined to a bottom end of the cyclone unit that collects the dust or dirt separated by the cyclone unit, the dust bin installed in such a manner that a longitudinal axis thereof is substantially perpendicular to the longitudinal axis of the cyclone unit; a nonporous envelope detachably disposed in the dust bin that stores the dust or dirt collected into the dust bin; and a pressure difference-generating passage to communicate an outlet of the air outflow part and the dust bin with each other so as to allow the nonporous envelope to come in contact with an inner surface of the dust bin by a pressure difference between the dust bin and the air outflow part.

Abstract: Provided are novel organic electroluminescent compounds, and organic electroluminescent devices comprising the same as electroluminescent material. Specifically, the organic electroluminescent compounds according to the present invention are represented by Chemical Formula (1): wherein, at least one substituent(s) among Ar1, Ar2, R6, R7, R8, R9, R10, R11, R12, R13, R14 and R15 represent(s) The organic electroluminescent compounds according to the present invention exhibit high luminous efficiency and excellent life property of material, so that an OLED having very good operation life can be manufactured therefrom. Further, the organic electroluminescent compound according to the present invention, when it is contained in an electroluminescent layer or a hole transport layer, lowers the operation voltage to result in noticeable decrease in power consumption, with exhibiting at least comparable luminous efficiency as compared to conventional OLED's.

Abstract: The present invention relates to novel organic electroluminescent compounds, and organic electroluminescent devices comprising the same.

Abstract: Provided are novel organic electroluminescent compounds and organic electroluminescent devices and organic solar cells comprising the same. Specifically, the organic electroluminescent compounds according to the invention are characterized in that they are represented by Chemical Formula (1): wherein, R1 through R10 cannot be hydrogen all at the same time. The organic electroluminescent compounds according to the invention exhibit high luminous efficiency and excellent color purity and life property of material, so that an OLED having very good operation life can be manufactured therefrom.

Abstract: A power cord cooling apparatus disposed in a cord reel chamber formed inside a main body of the vacuum cleaner to cool a power cord wound around a cord reel, wherein the power cord cooling apparatus allows outside air to enter the cord reel chamber, to contact the power cord wound around the cord reel, and to be discharged outside the cord reel chamber via a center space in the cord reel.

Abstract: Provided are a novel organic electroluminescent compound and an organic electroluminescent device using the same as an electroluminescent material.

Abstract: The present invention relates to novel organic electroluminescent compounds, and organic electroluminescent devices comprising the same as electroluminescent material. Specifically, the organic electroluminescent compounds according to the invention are characterized in that they are represented by Chemical Formula (1): wherein, L1 is a substituent selected from the following structures; A and B independently represent a chemical bond, or a substituent selected from the following structures; m and n independently represent an integer from 0 to 4; provided that, if represents both X1 and X2 represent NR33, and both Y1 and Y2 represent a chemical bond, then R33 does not represent hydrogen or (C1-C5)alkyl. The organic electroluminescent compounds according to the invention exhibit high luminous efficiency in blue color and excellent life property of material, so that an OLED having very good operation life can be prepared therefrom.

Abstract: Provided are novel organic electroluminescent compounds characterized in that they are represented by Chemical Formula (1): wherein, ring A and ring B independently represent a saturated 5- or 6-membered heterocyclic amino group, or a substituent selected from the following structures: wherein the saturated 5- or 6-membered heterocyclic amino group may further comprise one or more heteroatom(s) selected from NR36, O and S; and a and b independently represent an integer from 0 to 4, provided that (a+b) is an integer from 1 to 4.

Abstract: The present invention relates to novel organic electroluminescent compounds, and organic electroluminescent devices employing the same as electroluminescent material. Specifically, the organic electroluminescent compounds according to the invention are characterized in that they are represented by Chemical Formula (1). Since the organic electroluminescent compounds according to the invention have good luminous efficiency and excellent life property of material, OLED's having very good operation life can be manufactured therefrom.

Abstract: Provided are novel organic electroluminescent compounds and organic electroluminescent devices comprising the same as electroluminescent material. Specifically, the organic electroluminescent compounds according to the invention are characterized in that they are represented by Chemical Formula (1): wherein, L is selected from the following structures. The organic electroluminescent compounds according to the invention exhibit high luminous efficiency in blue color and excellent life property as a material, so that an OLED having very good operation life can be prepared therefrom.

Abstract: Provided are novel organic electroluminescent compounds, and organic electroluminescent devices and organic solar cells employing the same. Specifically, the organic electroluminescent compounds according to the invention are characterized in that they are represented by Chemical Formula (1): wherein, A, B, C and D independently represent CR5 or N, provided that A, B, C and D cannot represent CR5 all at the same time. Since the organic electroluminescent compounds according to the invention have good luminous efficiency and excellent color purity and life property of material, OLED's having very good operation life can be manufactured therefrom.

Abstract: The present invention relates to novel organic electroluminescent compounds, and organic electroluminescent devices employing the same as electroluminescent material. Specifically, the organic electroluminescent compounds according to the invention are characterized in that they are represented by Chemical Formula (1): Since the organic electroluminescent compounds according to the invention have good luminous efficiency and life property of material, OLED's having very good operation lifetime can be manufactured.

Abstract: The present invention relates to novel organic electroluminescent compounds, and organic electroluminescent devices employing the same in an electroluminescent layer. Specifically, the organic electroluminescent compounds according to the invention are characterized in that they are represented by Chemical Formula (1) or Chemical Formula (2): provided that the total number of carbons in R1 or R2 is from 21 to 60. Since the organic electroluminescent compounds according to the invention have good luminous efficiency and excellent life property of material, organic electroluminescent devices having high color purity and luminance with very good operation life can be manufactured therefrom.