There is provided a light emitting device in which low power consumption can be realized even in the case of a large screen. Specifically, a decoding device of a transcoder 106 decodes a source encoded stream to generate decoded video data and extracts past coding parameters superposed in the encoded stream as history_stream. The computer system further comprises at least a first context, a second context and a third context. The drinking vessel may further be provided with light-absorbing luminescent material to enhance the appearance and visibility of the drinking vessel as well as the level of the liquid contents when in a dark or dim light environment. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way. Gaps g1 and g3 defined by the outer walls of the rotor and the stator walls, and a gap g2 defined by the inner cylinder wall of the rotor and the stator wall during the rest of the pump are formed such that they increase with the distance from the rotor shaft center and g1>g2 and g1>g3 are satisfied.