Light emitting device and production process thereof

A method of producing an eleotrolumnescence light emitting device, comprising the sequential steps of:

• forming plural positive electrodes arranged in parallel at a fixed interval on a substrate to form a substrate with electrodes;
• moving the substrate with electrodes along a transfer drum;
• forming a patterned insulator layer on the substrate by electrophotography by i) radiating a laser beam on a photo conductor drum surface to form a lattice shape latent image pattern corresponding to an insulator layer, ii) applying a toner to the pattern located on the drum surface, iii) moving the drum surface with the pattern into proximity with the transfer drum to transfer the pattern containing toner to the substrate moving along the transfer drum, iv) fixing the toner to the substrate by applying heat and pressure to the toner contacting the substrate to form the patterned insulator layer on the substrate;
• and
• forming plural light emitting layers within the patterned insulator layer by electrophotography using polymer toners comprising light emitting materials corresponding to desired colors.