Abstract: Provided is a novel compound capable of improving the luminous efficiency, stability and life span of a device, an organic electric element using the same, and an electronic device thereof.

Abstract: A vehicle height adjusting apparatus for adjusting a height of a vehicle body of a vehicle is provided. The vehicle height adjusting apparatus includes an electric motor provided with a stator and a rotor and formed to have a structure in which a central portion thereof is penetrated; a screw nut fixed to the rotor of the electric motor and provided with a threaded portion on an inner peripheral surface thereof; a screw shaft inserted into and coupled to the inner peripheral surface of the screw nut and provided with a corresponding threaded portion having a shape corresponding to the threaded portion of the screw nut on an outer peripheral surface thereof; a guide portion configured to guide a relative movement between the screw nut and the screw shaft in a longitudinal direction.

Abstract: Embodiments of the inventive concept provide an ultrasonic medical instrument moving horizontally by adjusting a depth wise location of an ultrasonic wave generating unit while not influencing an internal volume of a cartridge and variously setting focusing depths of ultrasonic waves in skin.