Abstract: Disclosed are polycyclic aromatic compounds that can be employed in various organic layers of organic electroluminescent devices. Also disclosed are organic electroluminescent devices including the polycyclic aromatic compounds. The organic electroluminescent devices are highly efficient and long lasting and have greatly improved luminous efficiency.

Abstract: An embodiment armrest assembly for a vehicle includes an armrest including a main body and a lid, an armrest board to which the armrest is rotatably coupled and in which the armrest is accommodated in an erect state, and a skirt coupled to a rear bezel housing of the lid and to the armrest board and correspondingly covering a rear space of the lid when the armrest is rotated forward, wherein the skirt has a panel shape and includes a hard material.

Abstract: An embodiment armrest assembly for a vehicle includes an armrest rotatably coupled to an armrest board and configured to be extended from the armrest board by rotating forward or to be housed in the armrest board by rotating and standing and a speed-reduction damper mechanism connecting the armrest and the armrest board and configured to make a rotational speed of the armrest uniform by reducing the rotational speed when the armrest rotates to be extended.

Abstract: The present disclosure relates to a power circuit and a display device including the same. The power circuit includes an output terminal configured to supply an output voltage to a digital circuit; a current sensing resistor connected to the output terminal; a sensing part configured to receive a first reference voltage and voltages of both ends of the current sensing resistor and vary one of a feedback voltage and a second reference voltage; and a voltage generation part configured to receive the feedback voltage and the second reference voltage and lowers the output voltage when a current flowing through the current sensing resistor decreases.

Abstract: The present invention relates to a novel polycyclic compound employed in an organic layer of an organoelectro luminescent device, wherein the organoelectro luminescent device employing the compound according to the present invention has remarkably improved luminous efficiency and a long lifespan. According to the present invention, it is possible to implement a highly efficient and long-life organoelectro luminescent device that can be effectively applied to various display devices.

Abstract: A method of controlling an EOP of a powertrain may include determining, by a controller electrically connected to the EOP, whether an oil sloshing phenomenon in which it is difficult for oil to return to a space where an oil intake port of the EOP is positioned may occur while a vehicle is running; and reducing, by the controller, the revolutions per minute (RPM) of the EOP by a predetermined reduced RPM when it is determined that the oil sloshing phenomenon may occur.

Abstract: The present invention relates to a device for a physical unclonable function having unique characteristics, and the device for a physical unclonable function according to the present invention includes a nano-pattern corresponding to a self-assembled structure. As the device for a physical unclonable function according to the present invention has a PUF pattern based on a self-assembled structure formed by spontaneous phase separation behavior of a block copolymer having non-deterministic characteristics, the device for a physical unclonable function may have unclonable unique characteristics.

Abstract: Disclosed is a semiconductor light emitting device including: A semiconductor light emitting device comprising: a semiconductor light emitting device chip including a plurality of semiconductor layers, and electrodes electrically connected to the plurality of semiconductor layers, the plurality of semiconductor layers including an active layer adapted to generate light by recombination of electrons and holes; an encapsulating member of a lens shape made of a light-transmitting thermoplastic resin having at least 90% transmissivity for light of a wavelength band ranging from 100 nm to 400 nm, for surrounding the semiconductor light emitting device chip; and an external substrate including conductive layers electrically connected to the electrodes of the semiconductor light emitting device chip. The encapsulating member is formed in a way that all faces of the encapsulating member are exposed to outside, except for a portion of the lower face thereof in contact with the external substrate.

Abstract: Disclosed is a system for detecting and calibrating coordinates of infrared touch pen for electronic blackboard. According to the embodiment of the present invention, a system for detecting and calibrating coordinates of infrared touch pen for electronic blackboard includes a laser irradiation unit for irradiating a laser pointer to a predetermined Region 1, a camera photographing unit photographing the Region 1 and display panel, an image analysis unit that analyzes image data captured by the camera photographing unit and determines detection of an infrared touch pen, a touch pen detection unit calculating coordinate information of the infrared touch pen when the infrared touch pen is detected by the image analysis unit, and a coordinate calibration unit for calibrating the coordinate information calculated based on the image data analyzed by the image analysis unit.

Abstract: System and method for removing scale of a sewer pipe using microbial mist type spray, the system including a microbe storage tank to store liquid microbes; a chamber connected with the microbe storage tank through an injection pipe and supplied with a determined, metered amount of liquid microbes, if needing to spray liquid microbes into the sewer pipe; a metering pump provided on one side of the injection pipe, to supply power for injecting a metered amount of liquid microbes into the chamber; an air tank to store compressed air; a supply pipe to supply compressed air into the chamber when the liquid microbes are sprayed; a supply tube to allow liquid microbes having air cavities resulting from supply of the compressed air to flow; and a spray nozzle provided at an end of the supply tube, to spray liquid microbes in a mist form into the sewer pipe.

Abstract: Disclosed is a semiconductor light emitting device including: A semiconductor light emitting device comprising: a semiconductor light emitting device chip including a plurality of semiconductor layers, and electrodes electrically connected to the plurality of semiconductor layers, the plurality of semiconductor layers including an active layer adapted to generate light by recombination of electrons and holes; an encapsulating member of a lens shape made of a light-transmitting thermoplastic resin having at least 90% transmissivity for light of a wavelength band ranging from 100 nm to 400 nm, for surrounding the semiconductor light emitting device chip; and an external substrate including conductive layers electrically connected to the electrodes of the semiconductor light emitting device chip. The encapsulating member is formed in a way that all faces of the encapsulating member are exposed to outside, except for a portion of the lower face thereof in contact with the external substrate.

Abstract: An aluminum alloy including aluminum, about 6 to about 17.4 weight percent by weight magnesium, and at least one of chromium up to about 0.2 percent by weight, zirconium up to about 0.2 percent by weight and manganese up to about 0.3 percent by weight.

Abstract: An apparatus for fabricating a microneedle includes a first substrate having a plurality of first spaced viscous materials formed on one side thereof and including at least one first transmission area, a second substrate disposed opposite to the first substrate, having a plurality of second spaced viscous materials formed on one side thereof facing the first substrate and including at least one second transmission area corresponding to the first transmission area, a light emitting unit arranged to correspond to the first transmission area on the other side of the first substrate and emitting light, and a light receiving unit arranged to correspond to the second transmission area on the other side of the second substrate. The microneedle manufacturing apparatus checks whether the first substrate and the second substrate are aligned according to whether the light receiving unit receives light emitted from the light emitting unit.

Abstract: Disclosed is a semiconductor light emitting device comprising: an external substrate; a first semiconductor light emitting device chip provided on the external substrate, comprising a first plurality of semiconductor layers including a first active layer for generating ultraviolet light by recombination of electrons and holes, and a first electrode electrically connected to the first plurality of semiconductor layers; a lens configured to surround the first semiconductor light emitting device chip, the lens serving to refract the ultraviolet light from the first semiconductor light emitting device chip and forming an orientation angle within a predefined range; and, a second semiconductor light emitting device chip provided on the external substrate, the second semiconductor light emitting device comprising a second plurality of semiconductor layers including a second active layer for generating visible light by recombination of electrons and holes, and a second electrode electrically connected to the second

Abstract: An aluminum alloy including aluminum, about 2.5 to about 17.4 weight percent by weight magnesium, about 50 to about 3000 ppm calcium, and at least one of chromium up to about 0.2 percent by weight, zirconium up to about 0.2 percent by weight and manganese up to about 0.3 percent by weight.

Abstract: Disclosed is a method for manufacturing a semiconductor light emitting device, the method including: providing a mask having a plurality of openings on a base; placing semiconductor light emitting chips on exposed portions of the base through the openings, respectively, by a device carrier which recognizes a shape of the mask and calibrates position for a semiconductor light emitting chip to be seated; and supplying an encapsulant to each of the openings, with the mask serving as a dam.

Abstract: Disclosed is a method for manufacturing a semiconductor light emitting device, the method including: providing a mask having a plurality of openings on a base; placing semiconductor light emitting chips on exposed portions of the base through the openings, respectively, by a device carrier which recognizes a shape of the mask and calibrates position for a semiconductor light emitting chip to be seated; and supplying an encapsulant to each of the openings, with the mask serving as a dam.

Abstract: Disclosed is a method for manufacturing a semiconductor light emitting device, the method including: providing a mask having a plurality of openings on a base; placing semiconductor light emitting chips on exposed portions of the base through the openings, respectively, by a device carrier which recognizes a shape of the mask and calibrates position for a semiconductor light emitting chip to be seated; and supplying an encapsulant to each of the openings, with the mask serving as a dam.

Abstract: Disclosed is a method for manufacturing a semiconductor light emitting device, the method including: providing a mask having a plurality of openings on a base; placing semiconductor light emitting chips on exposed portions of the base through the openings, respectively, by a device carrier which recognizes a shape of the mask and calibrates position for a semiconductor light emitting chip to be seated; and supplying an encapsulant to each of the openings, with the mask serving as a dam.