Abstract: A massage device includes a controller for controlling the massage device; a body massage unit including a massage module for massaging at least a part of the user's body under the control of the controller; and a leg massage unit for massaging the user's legs under the control of the controller. The leg massage unit includes a first leg massage unit for massaging one of the user's legs, and a second leg massage unit for massaging the user's other leg, with the first leg massage unit and the second leg massage unit able to operate independently.

Abstract: The present invention relates to a visible light-sensitive photocatalyst composition and a visible light-sensitive photocatalyst film comprising the same, and more particularly, to a visible light-sensitive photocatalyst composition and a visible light-sensitive photocatalyst film comprising the same, which has catalytic properties of oxidizing and decomposing organic matter in the air in not only ultraviolet rays but also visible rays, sunlight and indoor lights, and is capable of removing harmful substances, deodorizing, sterilizing, etc., and can provide visibility.

Abstract: Disclosed are a metal halide perovskite light-emitting material with controlled defects and wavelength converting body having the same, and light-emitting device. Monvalent organic cation (A2) contained in the perovskite nanocrystal can stabilize the perovskite nanocrystal and suppress the generation of defects in the crystal due to the entropy effect. Remnant A2 cations not included in the perovskite nanocrystal form a structure surrounding the perovskite nanocrystal particles, and passivate defects generated on the surface of the perovskite nanocrystal particles. Photoluminescence quantum efficiency, photoluminescence lifetime, and stability are improved through passivation of defects, and the metal halide perovskite light-emitting material can be effectively used in a light-emitting layer or a wavelength conversion layer of a light-emitting device.