A method for providing preferential coloring to a portion of an
electrochromic window assembly, includes the steps of providing an
electrochromic window assembly comprising first and second spaced apart
transparent substrates defining a chamber therebetween, the first
transparent substrate having a first conductive coating and the second
transparent substrate having a second conductive coating, the chamber
containing an electrochromic medium capable of coloring upon application
of electrical potential thereto to provide reduced luminous
transmittance; electrically connecting a plurality of first spaced
facilities to the first conductive coating for providing the electrical
potential to the first conductive coating; electrically connecting a
plurality of second spaced facilities to the second conductive coating
for providing the electrical potential to the second conductive coating;
and applying an electrical current to selected ones of the plurality of
first spaced facilities and to selected ones of the plurality of second
spaced facilities to establish the electrical potential through a
selected portion of the electrochromic medium such that the selected
portion changes color and reduces its luminous transmittance.