A fabrication method is provided for a core-shell-shell nanowire transistor. An RGBX type self light-emitting display is configured to display video, based on the RGBX signal obtained by the RGB-RGBX signal converter. Moreover, in a sub-scanning direction, light incident on the resonance mirror is parallel light, and the first lens of the second optical system has a negative refractive power and a second lens thereof has a positive refractive power. The analog multiplier is particularly suitable as a down-converter in a reception path of a mobile radio system.