An organic electroluminescent display (EL) device including a substrate, a transparent
electrode, a hole transport layer, a light emitting layer, an electron transport
layer and a cathode, sequentially stacked, wherein assuming that the sum of a geometric
thickness of the electron transport layer, a geometric thickness of the light emitting
layer is denoted by l1, the l1 with a maximum of luminance is denoted
by a peak_l1, the sum of a geometric thickness of the hole transport layer
and a geometric thickness of the transparent electrode is denoted by l2,
the geometric thickness of the hole transport layer is denoted by d(HTL), the d(HTL)
with a maximum or minimum of luminance is denoted by a peak_d(HTL), the l1 is
set to have an maximum of luminance and l2 is set such that a thickness
distribution according to colors of red, green and blue at the peak_l2 is
within the range of 30 nm, respectively.
