Abstract: Proposed are an apparatus and a method for emitting multi-wavelength lasers. The apparatus for emitting multi-wavelength lasers includes a main body configured to perform overall control and operation, a handpiece which is operated by the control of the main body and is connected to the main body by wire, and a tip capable of being coupled to one side of the handpiece, wherein the main body includes a first power supply part, a display part, a control part, a laser generation part, a temperature control part, and a cooling part, wherein the laser generation part includes a first laser generator and a second laser generator which output lasers of different wavelengths, respectively, and the temperature control part includes a first temperature control part which controls a temperature of the first laser generator, and a second temperature control part which controls a temperature of the second laser generator.

Abstract: Proposed is a driving method for a height-adjustable biological signal measuring device. The method includes a step of recognizing a user's unique information, a step of setting the focus of a video image measuring device to a preset value, a step of photographing the user and acquiring the user's images from the video image measuring device, a step of acquiring the image data from the photographed video image data and preprocessing the images in a video image processing unit, a step of recognizing a face according to the user's state using the pre-processed image, a step of determining whether the user's face is at the center of the screen, and a step of fixing the position of a terminal and measuring the user's biometric information.

Abstract: Proposed is a high frequency wave and ultrasonic wave fusion treatment device used for skin treatment and improvement that includes a housing, a tip disposed at one end of the housing, a plurality of high frequency wave transfer parts disposed on the tip and configured to transfer high frequency wave energy to skin in a pulsed manner, an ultrasonic wave transfer part disposed on the tip, but spaced apart from the high frequency wave transfer parts, and configured to transfer generated ultrasonic wave energy through an ultrasonic wave irradiation surface provided on the tip to the skin, and a movement part disposed inside the housing or the tip and configured to move the ultrasonic wave transfer part along the ultrasonic wave irradiation surface.

Abstract: Proposed is a medical needle which performs treatment by stimulating acupuncture point of a human body, the medical needle including an electrical stimulation output module which generates a first signal which is an electromagnetic wave, an optical stimulation output module which generates a second signal which is a laser, and a probe needle which is inserted into a skin tissue of a human body to stimulate acupuncture point of the human body and receives the first signal generated from the electrical stimulation output module and the second signal generated from the optical stimulation output module so as to provide the first signal and the second signal to the skin tissue.

Abstract: The rotary engine includes a cylinder body having a cylinder chamber, an intake port, an exhaust port, and a spark plug, and a rotor which is received in the cylinder chamber to eccentrically rotate while coming into contact at seal faces thereof with an inner circumferential contact wall of the cylinder chamber to thereby implement intake, compression, expansion, and exhaust strokes. The rotor has an elliptical outer contour, and the inner circumferential contact wall of the cylinder chamber coincides with a specific curve, which is described by opposite apexes of the elliptical rotor in a direction of a major axis, when the rotor eccentrically rotates. The intake port and exhaust port are provided with opening/closing valves, respectively. Sealing performance between the cylinder chamber and the rotor may achieve an enhancement in the efficiency of fuel combustion and engine output and prevent waste of fuel.