A container comprises a body portion, a lid portion and, mounted on one of the body portion and the lid portion, a locking member. The display panel comprises a first substrate, a second substrate, a display control circuit and a force sensing circuit. The sound absorption layer 202 has a two-layer structure of a high-density sound absorption layer 202a and a low-density sound absorption layer 202b, which have different densities. A fluid reservoir is situated within the housing. The method enables digital video processing devices such as DVD players, digital broadcast receivers, or HD TVs to enlarge an original image to an arbitrary size without resulting in distortions in the enlarged image, thereby preventing deteriorated image quality.