Electroluminescence display device and method of manufacturing the same

A method of manufacturing an EL display device, the method comprising:

• forming a first electrode above a substrate;
• forming a first intermediate layer including a luminescence layer above the first electrode;
• forming a second electrode on top of the first intermediate layer;
• forming a diffraction grating on top of the second electrode;
• and
• forming a color converting layer on top of the diffraction grating.

An EL display device, comprising:

• a substrate;
• a first electrode formed above the substrate;
• a second electrode formed above the first electrode and facing the first electrode;
• a first intermediate layer including a luminescence layer and disposed between the first and second electrodes;
• a color converting layer disposed between the substrate and the first electrode;
• and
• a diffraction grating disposed between the color converting layer and the first electrode.