An electroluminescence (EL) display device is disclosed with a microlens
layer positioned between a light-emission layer and a color converting
layer or a color filter layer. The microlens layer can be formed
separately or integrally with an electrode of the EL display device.
Light emitted from the light-emitting layer passes through an electrode
and then through the microlens layer, which has a higher refractive index
than the electrode to focus light in a predetermined direction. The light
then passes through the color converting layer or a color filter layer to
emit red, green, or blue light from the device. The microlens layer and
color converting layer or color filter layer can be disposed for either
active matrix or passive matrix, and for either a top-emission type,
bottom-emission type, or dual emission type EL display device for
improved external light coupling efficiency and brightness.