Abstract: A machine tool arbor for holding a rotating machine part or workpiece is fitted with an actuator member at a back or distal end of an arbor main body for tool-less chucking and unchucking of a machine part or workpiece at a front or proximate end of the arbor main body. An actuator ring or knob is mounted at the back end of the arbor main body which, when rotated in one direction, causes an pusher member (collet pusher part, hydraulic piston) to move in such a manner as to displace a chuck member (inclined collet, flex collet, expansion ring) and release the machine part or workpiece that is chucked. When rotated in the opposite direction, the actuator knob causes the actuator member to move in an opposite manner as to fix the chuck member in a position to firmly hold the machine part or workpiece to be chucked.

Abstract: Provided are an indene derivative compound represented by Formula 1 below and an organic light emitting device including the same: X—Ar1—Ar2—Y ??Formula 1 wherein Ar1, Ar2 and X are described in the detailed description, and Y is represented by one of Formulae 2a to 2d: wherein R1 to R4 and Z are described in the detailed description. An organic light emitting device having improved driving voltage properties, brightness, efficiency and color purity can be prepared by including the indene derivative compound.

Abstract: An organic electroluminescent device having an emission layer, which is constructed with a host, a phosphorescence emission molecule as a dopant, and a fluorescence supporter. The fluorescence supporter receives energy from the host or traps energy directly, and then transfers the energy to the dopant or self-emits light. An emission spectrum of the fluorescence supporter and an absorption spectrum of the phosphorescence emission molecule overlap partly or completely. The organic electroluminescent device has improved luminous efficiency and color purity characteristics in comparison with a conventional organic electroluminescent device having an emission layer, which is composed of a phosphorescent dopant and a host. This system is useful in the manufacture of, in particular, blue emission devices.

Abstract: An aromatic compound represented by Formula 1 below and an organic light-emitting diode including the same: M1-(B)n-M2 ??(1) The aromatic compound has excellent thermal stability and emission characteristics. Thus, the organic light-emitting diode employing the aromatic compound can exhibit a low driving voltage, high efficiency, and high brightness.

Abstract: A white organic light emitting device includes an anode, a cathode, a charge generation layer arranged between the anode and the cathode and an organic layer arrangement arranged between the anode and the cathode, the organic layer arrangement including a green light emitting layer, a blue light emitting layer, and a red light emitting layer, one of the green light emitting layer, the blue light emitting layer, and the red light emitting layer includes a first light emitting layer and second light emitting layer, the charge generation layer being arranged between the first light emitting layer and the second light emitting layer.

Abstract: An organometallic complex that increases an energy band gap between HOMO and triplet MLCT states, and enables highly efficient phospholuminescence and can be used for an organic electroluminescent device. The organometallic complex, which is suitably used for forming an organic layer of the organic electroluminescent device, provides a luminescence maximum emission in the wavelength range of 400-650 nm, and induces white electroluminescence when combined with green or red luminescent materials.

Abstract: Provided are a conducting polymer film composition comprising a graft copolymer of a self-doped conducting polymer and an organic opto-electronic device comprising a conducting polymer film formed of the above-mentioned composition. In the graft copolymer, the conducting polymer and a polyacid are connected to each other via chemical binding. Therefore, the composition of the present invention can be used in organic opto-electronic devices with minimal or no dedoping occurring from heat generated inside the device. As a result, the present invention can improve efficiency and life-time of the organic opto-electronic device.

Abstract: In a gear burnishing system having burnishing gear positions arranged around a subject gear at its center, a burnishing gear is formed as a scraper gear retained on a shaft rotationally by a keyway formed in an inner bore of the scraper gear which is wider by a predefined gap than a corresponding key formed on the shaft such that the scraper gear can move angularly by a small amount for maximum contact on the subject gear. In a preferred embodiment, a number of scraper gears are arranged in a stack on the shaft. Both ends of each scraper gear are beveled along the peripheral edges to cause each tooth to be raked and to create knife blades and serve to trap debris. Each tooth is formed with equal blade angles and a recess with compound angles for debris entrapment. The scraper gears can be mounted with bearings for limited gimbal movement to assure following the subject gear.

Abstract: An arbor of a machine tool has a collet arbor base, an expandable and releasable collet having a top band coupled to a bottom band, an actuator pin slidable from the collet arbor base arranged concentrically within the collet and having a reverse male taper on an upper end thereof that actuates the top band of the collet, and a conical ring with a taper angle matching the upper end of the actuator pin arranged proximate a lower part of the actuator pin concentric therewith, wherein the reverse male taper at the upper end of the actuator pin activating the top band and the conical ring having a matching taper activating the bottom band of the collet cause the collet to expand and retract accordingly.

Abstract: A binuclear organometallic complex enabling highly efficient phospholuminescence and an organic electroluminescent device using the same. The binuclear organometallic complex, which can be suitably used to form an organic layer of an organic electroluminescent device, produces luminescence in the wavelength range of 430-650 nm, and induces white electroluminescence when combined with green and red luminescent materials.

Abstract: Provided are an organic light emitting compound represented by Formula 1 below, an organic light emitting device comprising the same, and a method of manufacturing the light emitting device: wherein CY1, CY2, Ar1, R1 and R2 are described in the detailed description of the invention. An organic light emitting device comprising the organic light emitting compound has low turn-on voltage, high efficiency, high color purity and high luminance.

Abstract: Provided are an organic light emitting compound represented by Formula 1 below, an organic light emitting device comprising the same, and a method of manufacturing the organic light emitting device: where CY1 and CY2 are each independently a fused C6-C50 aromatic ring, Ar1 is a substituted or unsubstituted C6-C50 arylene group, Ar2, Ar3, Ar4, and Ar5 are each independently a substituted or unsubstituted C6-C50 aryl group, m and n are independently 0-3, and R1 and R2 are substituent groups. An organic light emitting device comprising the organic light emitting compound has low turn-on voltage, high efficiency, high color purity and high luminance.

Abstract: An organometallic complex that increases an energy band gap between HOMO and triplet MLCT states, and enables highly efficient phospholuminescence and can be used for an organic electroluminescent device. The organometallic complex, which is suitably used for forming an organic layer of the organic electroluminescent device, provides a luminescence maximum emission in the wavelength range of 400-650 nm, and induces white electroluminescence when combined with green or red luminescent materials.

Abstract: Provided are an anthracene derivative compound represented by Formula 1 below and an organic light-emitting device using the same: wherein Ar1 and Ar2 are each independently aromatic groups, R1 and R2 are each independently substituent groups, and X is a heteroatom or substituted heteroatom. The use of the anthracene derivative compound enables to produce an organic light-emitting device with better driving voltage, brightness, efficiency, and color purity.

Abstract: Provided are a compound represented by Formula 1 below and an organic light-emitting device including the same: wherein X is a C, Si, or Ge atom disubstituted with H or C1-60 organic groups, Ra-Rj are C1-60 organic groups, CY1 is a substituted or unsubstituted C5-C60 aromatic ring or a substituted or unsubstituted C2-C60 heteroaromatic ring, and n is 0 or 1. The use of the compound provides an organic light-emitting device having a low operating voltage and good efficiency and brightness.

Abstract: Provided are a highly efficient phosphorescent organometallic complex and an organic electroluminescent (EL) device using the same. The organometallic complex can be used in the formation of an organic layer of the organic EL device, and can emit light in a red wavelength range as a highly efficient phosphorescent material. The organic EL device using the organometallic complex can exhibit high brightness and a low driving voltage.

Abstract: Provided are binuclear organometallic complexes enabling highly efficient phospholuminescence and an organic electroluminescent device using the same. The binuclear organometallic complexes, which are suitably used for forming an organic layer of the organic electroluminescent device, provides maximum luminescence emission in the wavelength range of 400-650 nm, and induces white electroluminescence when combined with green or red luminescent materials.

Abstract: Provided are an organic light-emitting compound that is a diarylethene derivative represented by Formula 1, and an organic electroluminescent (EL) device using the organic light-emitting compound, and a method of manufacturing the organic EL device: where R1, Ar1, Ar2, Ar3, Ar4, Ar5, Ar6, k, l, m, and n are the same as defined in the specification. The organic light-emitting compound contains a cis-diarylethene group linked with an aliphatic ring, and thus crystallization of the organic light-emitting compound is unlikely to occur and the compound is highly soluble to organic solvents and easily provides liquid formulation with organic solvents. Thus, the organic light-emitting compound can easily be used in organic EL devices. An organic EL device manufactured using the compound can have a thermostable layer and thus has improved light-emitting properties in term of superior turn-on voltage, efficiency, color purity, etc.

Abstract: Provided are an organic light-emitting compound represented by Formula 1 and an organic electroluminescent (EL) device using the same: The organic light-emitting compound has thermostability and photochemical stability in addition to superior electrical features. The organic EL device using the organic light-emitting compound has low driving voltage, high efficiency, and superior color purity.

Abstract: Provided are a dimethylenecyclohexane compound represented by Formula 1 below, a method of preparing the same and an organic light emitting device comprising the dimethylenecyclohexane compound: The organic light emitting device comprising the dimethylenecyclohexane compound represented by Formula 1 has a low driving voltage, excellent efficiency and improved color purity.