A shift-by-wire shift switching device and shift switching method that switch a shift range of an automatic transmission using an electric motor. The one-piece seat back frame includes a first side portion and a second side portion spaced apart from the first side portion, an upper cross portion and a lower cross portion. Corresponding systems and computer-readable media are also disclosed. As the gas stream passes through the ionising zone, the unwanted particles therein are charged and urged away from the outlet by the ioniser. The driving unit includes a pixel driving section electrically connected to the pixel portions to drive the pixel portions and an application driving section electrically connected to the connection line to drive the application module. The microwave oven further comprises a capacitor connected in parallel to the secondary coil of the high voltage transformer, forming a resonance circuit with the secondary coil.