A virtual wheel provides a leg pair as a conveyance mechanism for a land vehicle. A user navigates through a series of prompt screens to create a new custom envelope size for envelopes with irregular sizes. The semiconductor integrated circuit thus obtained by including the charge pump circuit is characterized in that rush current on startup of charge pumping is reduced and that output performance of a DC-CD converter is not impaired. In a third forward drive mode, at speeds of the vehicle higher than the predetermined speed, the traction motor, powered by the electric battery, together with the engine drive the wheels of the vehicle. Thus, a chromatography column can be packed in a fully automated fashion and such a column is 1) stable and 2) has the desired performance characteristic. The prism sheet extends toward the light source, and covering above the gap between the light source and the light guiding plate.