According to one embodiment, stacked layers of a nitride semiconductor include a substrate, a single crystal layer and a nitride semiconductor layer. A filter media is carried on and substantially surrounding the elongated member. A lug is mounted on an end of the locking member and abuts against a side of a periphery delimiting the opening. Still another aspect provides an illumination source including a housing including one or more LEDs; and a control circuit that selectively applies power from a source of electric power to the LEDs, thus controlling a light output color spectrum of the LEDs. The supporting device to fix the display apparatus to a wall includes a wire part coupled to the display apparatus, a wire hanger mounted to the wall, the wire hanger to hang the wire part on the wall, and a separation protector provided at the wire hanger, the separation protector serving to prevent the wire part from separating from the wire hanger. The legs, the front bars, and the arm supports are rotatable to at least a down position and an up position.