A patterned phosphor structure and EL laminate containing same, forming
red, green and blue sub-pixel phosphor elements for an AC
electroluminescent display. The patterned phosphor structure includes at
least a first and a second phosphor emitting light in different ranges of
the visible spectrum, but with combined emission spectra contains red,
green and blue light, the first and second phosphors being in a layer,
arranged in adjacent, repeating relationship to each other to provide a
plurality of repeating first and second phosphor deposits. The phosphor
structure also includes one or more means associated with one or more of
the first and second phosphor deposits for setting and equalizing the
threshold voltages of the red, green and blue sub-pixel phosphor elements,
and for setting the relative luminosities of the red, green and blue
sub-pixel phosphor elements so that they bear set ratios to one another at
each operating modulation voltage used to generate the desired
luminosities for red, green and blue.
