Light emitting device and control method thereof

A control method of a light emitting device, the method comprising:

• causing a first light emitter comprising a plurality of light emitting elements configured to emit light in a visible light region to emit light;
• causing a second light emitter comprising a plurality of light emitting elements configured to emit light in an ultraviolet B (UVB) region to emit light;
• and
• controlling the first light emitter and the second light emitter so that a sum of intensity of light emitted from the first light emitter and intensity of light emitted from the second light emitter is greater than or equal to a threshold illuminance value,
• wherein the light emitting device is implemented as a wall-hanging type installable on a wall and comprises a window-shaped structure, and
• wherein the controlling comprises:
• identifying a state of the window-shaped structure;
• controlling each of the first light emitter and the second light emitter to emit light based on an identification that the state of the window-shaped structure is a first state;
• and
• controlling each of the first light emitter and the second light emitter not to emit light based on an identification that the state of the window-shaped structure is a second state.