A bidirectional multidrop processor bus is connected to a plurality of bus agents. The wedge member is formed so as to have an inclination towards an axial direction of the stator core and the elastic plate member has a structure undulating towards the axial direction. Values in the on-screen and off-screen portions of the list are analyzed and processed to generate previews of the list. The power factor correction circuit is in the first state when no dimming of the LED is sensed, and the power factor correction circuit is in the second state when dimming of the LED is sensed.