According to one embodiment, an organic electroluminescent device includes first and second electrodes, an interconnection layer, an organic light emitting layer and a light scattering layer. The active fan includes a first impeller and a motor. The surface treatment includes a plasma treatment with argon gas, and a plasma treatment with a gas containing at least nitrogen gas. An audiovisual apparatus acquires the capsular work from the distribution center apparatus and requests the ticket necessary to make use of the capsular work from the ticket server apparatus. The information-display system includes information display terminals and an information-display server, wherein the server transmits a notice to the terminals indicating that there is an update, and then, the terminals acquire and display the updated information. The DA converter remains unchanged, even when the characteristics of the equalizer are changed.