Provided is a production apparatus for continuously producing aligned carbon nanotube aggregates on a substrate supporting a catalyst while continuously transferring the substrate. The opticalelectrical substrate includes: a wiring substrate; an optical waveguide disposed on the wiring substrate and configured to transmit an optical signal; a mirror support bonded onto the wiring substrate with an adhesive and being made of glass or silicon; and a mirror which reflects the optical signal and which is formed on an inclined surface of the mirror support. By using pigments in the colloidal layer, the emmission color of the electroluminescent device can be changed and the daylight contrast improved.